Crew members check the equipment in the nose of an An-26 aircraft used by the Hungarian Air Force to fly observation missions under the Open Skies Treaty, July 2004. (OSCE)
A German Armed Forces brass band marches past a Ukranian An-30 aircraft used to fly observations missions over the territory of Germany under the Open Skies Treaty. (OSCE)
Russian officers (right) greet members of a joint United Kingdom/Croatia observation flight over Russia under the Open Skies Treaty, 14 August 2006. (OSCE)
Members of a Russian crew come off their Tu-154 aircraft as they arrive in the United States, July 2000, before a flight under the Open Skies Treaty. (OSCE)
Russian and US crew members monitor equipment on board a Russian Tu-154 aircraft during an observation flight over the United States, 19 April 2006, under the Open Skies Treaty. (OSCE)
Crew members monitor equipment on board a Russian Tu-154 aircraft during an observation flight over the United States, 20 April 2006, under the Open Skies Treaty. (OSCE)
Italian crew members and their Russian counterparts pose next to a C-130H aircraft during flights over Russia, 30 September 2004, under the Open Skies Treaty. (OSCE)
Team members from Slovenia and the United Kingdom pose next to an Andover C Mk1 aircraft during a trial mission by UK over the Republic of Slovenia, at Joze Pucnik Airport, Brnik, March 2007. (OSCE)
Members of a Russian crew pose on the tarmac next to a Tu-154 aircraft together with their US counterparts during an observation flight over the territory of the United States under the open Skies Treaty, July 2000. (OSCE)
Swedish crew members pose next to their Saab-340B aircraft after an observation flight over the territory of Russia under the Open Skies Treaty, 6 April 2005. (OSCE)
Tony White (right) and his Swedish counterpart monitor equipment on board a Saab-340B aircraft over Slovakia during a joint US-Swedish training flight, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
Shaking hands after a joint UK-Croatia flight over Russia, 17 August 2006, under the Open Skies Treaty. Latvian representatives observed the flights. (OSCE)
Major Michal Villim (Left) of Slovakia on board a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
Members of a joint Canadian-Swedish-Italian flight over Georgia under the Open Skies Treaty pose, 30 November 2006, next to a Canadian C-130H aircraft. (OSCE)
A camera used on a Saab-340B aircraft over Slovakia during a joint US-Swedish training flight, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
On board a Saab-340B aircraft over Slovakia during a joint US-Swedish training flight, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
US experts check the nose cone of a Russian TU-154 aircraft, on 8 June 2004, before its flight over the territory of the United Sates under the Open Skies Treaty. (OSCE)
Monitoring equipment on board a Saab-340B aircraft during a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
Camera equipment pictured 22 June 2002 under the wing of a C-130H aircraft used by Benelux, Canada, France, Greece, Italy, Norway, Portugal and Spain for flights under the Open Skies Treaty. (OSCE)
Monitoring equipment on board a Saab-340B aircraft during a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
On board a Saab-340B aircraft during a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
Dennis A. Connaughtonof the US Defence Threat Reduction Agency stands next to a Saab-340B aircraft after a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
A rainbow in the sky over an Andover C Mk1 aircraft, 23 October 2000, used by the UK and Croatia for a flight over Hungary under the Open Skies Treaty. (OSCE)
A Saab-340B aircraft takes off during a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
Lt.Col. Ingemar Gyllensvaan (L) and Lt.Col. Chris Weatley, joint commanders of a US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty, stand next to a Saab-340B aircraft after the flight. (OSCE/Mikhail Evstafiev)
Examining the camera equipment under an aircraft before a joint training flight USA over Croatia and Slovenia, 21 March 2004, under the Open Skies Treaty. (OSCE)
A Saab-340B aircraft on the tarmac during a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
The crew of a Saab-340B aircraft during a joint US-Swedish training flight over Slovakia, 28 May 2008, under the Open Skies Treaty. (OSCE/Mikhail Evstafiev)
Canadian officer A/Lt.Col. John Preston and Russian officer Col. Alexander Baryshnikov shake hands after signing a document as part of a Russian mission over Canada under the Open Skies Treaty, September 2004. (OSCE)
The OC-135B observation aircraft used under the Open Skies Treaty. The aircraft flies unarmed observation flights over participating parties of the treaty. (U.S. Air Force)
A group photo, including of members of the Ukrainian team participating in flights under the Open Skies Treaty, next to some of the aircraft used under the Treaty. (OSCE)
Members of a Ukrainian team that perfomed flights under the Open Skies Treaty over Turkey from 2 to 6 September 2002 pose next to their aircraft. (OSCE)
A German serviceman examines a camera used on a US plane flying under the Open Skies Treaty during a ground inspection, 10 May 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
The nose of a US plane as it is inspected for future flights under the Open Skies Treaty, 10 May 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
A US plane being prepared for flights under the Open Skies Treaty, 6 May 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
Russian and US servicemen during mission planning prior to a US flight over the territory of Russia, 20 September 2007, under the Open Skies Treaty. (OSCE)
US and Russian servicemen on board a plane before a joint Russian-Swedish flight over the territory of the United Sates, under the Open Skies Treaty, 2 March 2008. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
Russian and US servicemen during mission planning prior to a US flight over the territory of Russia, 20 September 2007, under the Open Skies Treaty. (OSCE)
A US serviceman examines a film taken during a flight over Russia under the Open Skies Treaty, 19 March 2007. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
US military personnel monitor the equipment on board a Russian plane conducting a flight over the United States under the Open Skies Treaty, 25 May 2006. (OSCE)
A US serviceman looks over camera equipment installed on a plane flying over Russia under the Open Skies Treaty, 8 April 2004. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
Equipment used for a US flight under the Open Skies Treaty during a ground inspection, 9 May 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
A plane used under the Open Skies Treaty during a ground inspection, 6 August 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
A camera used on a US aircraft flying under the Open Skies Treaty during a ground inspection, 9 May 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
The tail of an OC-135B observation aircraft used by the United States under the Open Skies Treaty during a ground inspection, 6 May 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
A camera used on a US plane flying under the Open Skies Treaty during a ground inspection, 6 May 2002. The Treaty establishes a regime of unarmed aerial observation flights. (OSCE)
Georgian escort officer signs the leader of a film cassette while French and Italian sensor specialists look on following a joint Italian-French-Canadian observation mission over Georgia, 3 April 2008, under the Open Skies Treaty. (OSCE)
Canadian and American Deputy Team Chiefs conduct final mission planning for a joint observation flight over Ukraine, June 2004, under the Open Skies Treaty. (OSCE)
Members of a joint Canadian-US flight Canadian and American mission specialists monitor camera events during an observation mission over Ukraine, 14 July 2005, under the Open Skies Treaty. (OSCE)
Canadian sensor specialists unload a film magazine from the cameras during image degrading filter acceptance testing at Volkel Airforce base, in the Netherlands, 29 April 2008. (OSCE)
Russian and Danish military personnel responsible for a Russian flight over Denmark, July 2007, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights. (OSCE)
Russian and Danish military personnel develop a film shot during a Russian flight over Denmark, July 2007, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights. (OSCE)
Russian and Danish military personnel on board a Russian flight over Denmark, July 2007, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights. (OSCE)
A Czech military aircraft, April 2003, used under the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A C-130H plane used by Czech and Spanish military experts before a flight over Ukraine, November 2006, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Ukrainian military experts on board an AN-30 plane over the Czech Republic, April 2003, under the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A Russian military Antonov-30 airplane performing a flight over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A Ukrainian military Antonov-30 airplane performing a flight over the Czech Republic, April 2003, under the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A group photo after a Russian military flight over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Ukrainian military personnel greeted by their Czech counterparts after a flight over the Czech Republic, April 2003, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights over the territory of its 34 signatories. (OSCE)
Russian and Czech military experts discuss a flight over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A Ukrainian military Antonov-30 airplane that was used to fly over the Czech Republic, April 2003, under the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Russian military experts on a plane over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Czech, Spanish and Portuguese military during a flight over Russia in September 2007 under the Open Skies Treaty. The Treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A Russian Antonov-30 military airplane after a flight over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Czech, Spanish and Portuguese military during a flight over Russia in September 2007 under the Open Skies Treaty. The Treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Russian military experts on a plane over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A C-130H military plane with Czech, Spanish and Portuguese personnel before a flight over Russia, September 2007, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights over the territory of its 34 signatories. (OSCE)
Russian military experts on a plane over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Czech and Spanish military experts during a flight over Ukraine, May 2004, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Russian military experts on a plane over the Czech Republic, October 2007, as part of the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Czech and Spanish military experts discus a flight over Ukraine, May 2004, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
A Russian military Antonov-30 airplane prepared for a flight over the Czech Republic, August 2004, under the Open Skies Treaty. The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Czech and Spanish military experts before a flight over Ukraine, May 2004, under the Open Skies Treaty, which establishes a regime of unarmed aerial observation flights over the entire territory of its 34 signatories. (OSCE)
Older aircraft types like the AN-30 shown here carried out many of the trial flights of the Open Skies Treaty. (OSCE)
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Turkey certified its CN-235 CASA aircraft with optical sensors for use in Open Skies flights in May 2004. (OSCE)
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Longer range aircraft such as the C-130 Hercules are flown by several European countries who contribute to the Open Skies fleet. (OSCE)
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C-130 Hercules planes are used as Open Skies aircraft. The Open Skies Treaty allows States to overfly each others' territory with an observation aircraft. The flights can be used for conflict prevention, crisis management and to protect the environment. (USAF)