美国内华达州内利斯空军基地，红旗 11-3 联合空战演习，英国空军第9中队的“狂风”GR4 战斗轰炸机完成演习任务后返回基地。(A British Royal Air Force Tornado GR4 aircraft returns from a flight during Red Flag 11-3 at Nellis Air Force Base, Nev., March 10, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习，英国空军第9中队的“狂风”GR4 战斗轰炸机起飞执行演习任务。(A British Royal Air Force Tornado GR4 aircraft takes off for a training mission during Red Flag 11-3 at Nellis Air Force Base, Nev., March 10, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习，英国空军第9中队的“狂风”GR4 战斗轰炸机起飞执行演习任务。(NELLIS AIR FORCE BASE, Nev., -- A Royal Air Force Tornado GR4 takes off from Nellis Air Force Base, Nev., for a training mission during Red Flag 11-3 March 10. Red Flag is a realistic combat training exercise involving the air forces of the United States and its allies. The exercise is hosted north of Las Vegas on the Nevada Test and Training Range.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习，英国空军第9中队的“狂风”GR4 战斗轰炸机牵引返回机库。(British Royal Air Force maintainers assigned to No. 9 Squadron tow a Tornado GR4 aircraft back to the hangar during exercise Red Flag at Nellis Air Force Base, Nev., March 1, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习，英国空军第9中队“狂风”GR4 战斗轰炸机在检查维护。(British Royal air force Senior Aircraftsman Luke Howard, No. 9 Squadron, performs maintenance checks on Tornado GR4s during Red Flag 11-3, Nellis Air Force Base, Nev., March 1. Red Flag is a realistic combat training exercise involving the air forces of the United States and its allies. The exercise is hosted north of Las Vegas on the Nevada Test and Training Range.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习，英国空军第9中队“狂风”GR4 战斗轰炸机在检查维护。(A British Royal Air Force maintainer assigned to No. 9 Squadron performs maintenance checks on a Tornado GR4 aircraft during exercise Red Flag at Nellis Air Force Base, Nev., March 1, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习，英国空军“狂风”GR4 战斗轰炸机开始滑行，准备起飞执行演习任务。(A British Royal Air Force Tornado GR4 aircraft sits on the flight line during Red Flag 11-3 at Nellis Air Force Base, Nev., March 1, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习中，驻扎密歇根州塞尔弗里奇空中国民警卫队基地第127联队第107战斗机中队的二架 A-10 攻击机编队执行演习任务。(Two U.S. Air Force A-10 Thunderbolt II aircraft assigned to the 107th Fighter Squadron fly during a training mission as part of Red Flag 11-3 at Nellis Air Force Base, Nev., March 10, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习中，驻扎密歇根州塞尔弗里奇空中国民警卫队基地第127联队第107战斗机中队的二架 A-10 攻击机完成演习任务后返回基地准备降落。(Two U.S. Air Force A-10 Thunderbolt II aircraft assigned to the 107th Fighter Squadron prepare to land after completing a training mission during Red Flag 11-3 at Nellis Air Force Base, Nev., March 10, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)

美国内华达州内利斯空军基地，红旗 11-3 联合空战演习中，驻扎密歇根州塞尔弗里奇空中国民警卫队基地第127联队第107战斗机中队的 A-10 攻击机进行起飞前检查。(U.S. Air Force Staff Sgt. Charles DiCiuccio, right, a 127th Aircraft Maintenance Squadron crew chief, conducts preflight checks on an A-10 Thunderbolt II aircraft before a training mission during Red Flag 11-3 at Nellis Air Force Base, Nev., Feb. 24, 2011. Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations.)