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A Russian fighter Mig-29 OVT performs during the MAKS-2013, the International Aviation and Space Show, in Zhukovsky outside Moscow on August 27, 2013. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522356304 )

Visitors watch Russian pilot group the "Russian Knights" along with the "Strizhi" group performing at the opening of the MAKS Air Show in Zhukovsky outside Moscow on Tuesday, Aug. 27, 2013. (AP Photo/Ivan Sekretarev) ( Russia MAKS Air Show )

Russian Russian MiG-29OVT fighter jet performs at the opening of the MAKS Air Show in Zhukovsky outside Moscow on Tuesday, Aug. 27, 2013. (AP Photo/Ivan Sekretarev) ( Russia MAKS Air Show )

Russian air defense missile system Buk-M2 is on display at the opening of the MAKS Air Show in Zhukovsky outside Moscow on Tuesday, Aug. 27, 2013. Russia has supplied similar missiles to Syria. (AP Photo/Ivan Sekretarev) ( Russia MAKS Air Show )

A mixed flight group of Strizhi and Russkie Vityazi (Russian knights) perform during the MAKS-2013, the International Aviation and Space Show, in Zhukovsky, outside Moscow, on August 27, 2013. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522356311 )

Russian Russian MiG-29OVT fighter jet performs at the opening of the MAKS Air Show in Zhukovsky outside Moscow on Tuesday, Aug. 27, 2013. (AP Photo/Ivan Sekretarev) ( Russia MAKS Air Show )

Visitors look at an Antonov-70 plane during the International Aviation and Space Show MAKS-2013 on August 27, 2013 in Zhukovsky, outside Moscow. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522354376 )

A Russian fighter Mig-29 OVT performs during the MAKS-2013, the International Aviation and Space Show, in Zhukovsky outside Moscow on August 27, 2013. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522356276 )

Russian pilot group the "Russian Knights" along with the "Strizhi" group perform at the opening of the MAKS Air Show in Zhukovsky outside Moscow on Tuesday, Aug. 27, 2013. (AP Photo/Ivan Sekretarev) ( Russia MAKS Air Show )

Russian pilot group the "Russian Knights" along with the "Strizhi" group perform at the opening of the MAKS Air Show in Zhukovsky outside Moscow on Tuesday, Aug. 27, 2013.(AP Photo/Ivan Sekretarev) ( Russia MAKS Air Show )

Russia's Prime Minister Dmitry Medvedev visits the pavilion of the Rostechnologii Corporation at the MAKS International Aviation and Space Salon in Zhukovsky outside Moscow on August 27, 2013. AFP PHOTO / RIA NOVOSTI / POOL / EKATERINA SHTUKINA/AFP/Getty Images ( 522354911 )

Russian pilot group the "Russian Knights" along with the "Strizhi" group perform at the opening of the MAKS Air Show in Zhukovsky outside Moscow on Tuesday, Aug. 27, 2013. (AP Photo/Ivan Sekretarev) ( Russia MAKS Air Show )

An Airbus A380 aircraft is seen during the International Aviation and Space Show MAKS-2013 on August 27, 2013 in Zhukovsky, outside Moscow. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522354382 )

Visitors look at military aircrafts during the International Aviation and Space Show MAKS-2013 on August 27, 2013 in Zhukovsky, outside Moscow. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522354483 )

A mixed flight group of Strizhi and Russkie Vityazi (Russian knights) perform during the MAKS-2013, the International Aviation and Space Show, in Zhukovsky, outside Moscow, on August 27, 2013. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522356039 )

Visitors look at military helicopters during the International Aviation and Space Show MAKS-2013 on August 27, 2013 in Zhukovsky, outside Moscow. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522354461 )

Russia's Prime Minister Dmitry Medvedev (R) listen to explanations at the stand of the United Engine-Building Corporation ODK as he visits the pavilion of the United Industrial Corporation Obornprom at the MAKS International Aviation and Space Salon in Zhukovsky outside Moscow on August 27, 2013. AFP PHOTO / RIA NOVOSTI / POOL / EKATERINA SHTUKINA/AFP/Getty Images ( 522354872 )

Russia's stealth fighters T-50 perform during the MAKS-2013, the International Aviation and Space Show, in Zhukovsky, outside Moscow, on August 27, 2013. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522356041 )

Russia's Prime Minister Dmitry Medvedev (R) listens to explanations as he visits the pavilion of the United Industrial Corporation Obornprom at the MAKS International Aviation and Space Salon in Zhukovsky outside Moscow on August 27, 2013. AFP PHOTO / RIA NOVOSTI / POOL / EKATERINA SHTUKINA/AFP/Getty Images ( 522354878 )

Visitors look at military aircrafts during the International Aviation and Space Show MAKS-2013 on August 27, 2013 in Zhukovsky, outside Moscow. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522354477 )

A mixed flight group of Strizhi and Russkie Vityazi (Russian knights) perform during the MAKS-2013, the International Aviation and Space Show, in Zhukovsky, outside Moscow, on August 27, 2013. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522356308 )

A Russian stealth fighter T-50 performs during the MAKS-2013, the International Aviation and Space Show, in Zhukovsky, outside Moscow, on August 27, 2013. AFP PHOTO/KIRILL KUDRYAVTSEV/AFP/Getty Images ( 522356324 )