美国内华达州内利斯空军基地，红旗 13-2 联合空战演习，来自路易斯安那州巴克斯代尔空军基地第20轰炸机中队的 B-52H“同温层堡垒”轰炸机起飞执行演习任务。(A B-52 Stratofortress assigned to 20th Bomb Squadron, Barksdale Air Force Base, La., takes off during a Red Flag exercise at Nellis Air Force Base, Nev., Jan. 30, 2013. The B-52 is a long-range, strategic heavy bomber capable of dropping or launching a wide array of munitions, which has been part of the U.S. arsenal for more than 60 years.)

美国内华达州内利斯空军基地，红旗 13-2 联合空战演习，路易斯安那州巴克斯代尔空军基地第96轰炸机中队的 B-52H“同温层堡垒”轰炸机对准跑道准备降落。(A B-52 Stratofortress from Barksdale Air Force Base, La., banks towards the Nellis flight line for a landing during Red Flag 13-2 Jan. 24, 2013. The Red Flag exercise provides allied air forces the opportunity to train air-to-air combat operations on the Nevada Test and Training Range north of Las Vegas.)

美国内华达州内利斯空军基地，红旗 13-2 联合空战演习，路易斯安那州巴克斯代尔空军基地第96轰炸机中队的 B-52H“同温层堡垒”轰炸机着陆后释放阻力伞。(A B-52 Stratofortress from Barksdale Air Force Base, La., deploys its parachute as it lands at Nellis Air Force Base, Nev., during Red Flag 13-2 Jan. 24, 2013. Red Flag is a realistic combat training exercise involving the air forces of the United States and its allies.)

美国内华达州内利斯空军基地，红旗 13-2 联合空战演习中，美国空军第65入侵者中队一架“蓝色38”假想敌 F-15C 战斗机出动。(An F-15C Eagle from the 65th Aggressor Squadron participates in Red Flag 13-2 Jan. 24, 2013, at Nellis Air Force Base, Nev. The Aggressors participate in air-to-air tactics to prepare units for real world adversarial scenarios.)

美国内华达州内利斯空军基地，红旗 13-2 联合空战演习中，美国空军第64入侵者中队一架假想敌 F-16C 战斗机进行飞行前检查。(U.S. Air Force Airmen conduct pre-flight checks on a 64th Aggressor Squadron F-16 Fighting Falcon during Red Flag 13-2, Jan. 22, 2013, at Nellis Air Force Base, Nev. The 64 AGRS's mission is to prepare the combat air forces, joint and allied aircrews for tomorrow's victories with challenging and realistic threat replication, training, academics and feedback.)

美国内华达州内利斯空军基地，红旗 13-3 联合空战演习中，美国空军第79战斗机中队一架 F-16CM 滑出准备起飞。(A U.S. Air Force F-16 Fighting Falcon aircraft assigned to the 79th Fighter Squadron taxis before takeoff during Red Flag 13-3 at Nellis Air Force Base, Nev., March 11, 2013. 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 13-3 联合空战演习中，美国空军第79战斗机中队一架 F-16CM 进行飞行前检查。(U.S. Air Force crew chiefs assigned to the 20th Aircraft Maintenance Squadron prepare an F-16 Fighting Falcon aircraft assigned to the 79th Fighter Squadron for takeoff during Red Flag 13-3 at Nellis Air Force Base, Nev., March 6, 2013. 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 13-3 联合空战演习中，美国空军三架 KC-135 空中加油准备出动。(Three U.S. Air Force KC-135 Stratotankers prepare to depart for a training mission during Red Flag 13-3, Feb. 25, 2013, at Nellis Air Force Base, Nev. The KC-135 is a refueling aircraft utilized to extend the range and endurance of U.S. tactical fighters and bombers.)

美国内华达州内利斯空军基地，红旗 13-3 联合空战演习中，英国空军“台风”FGR4 战斗机正在起飞。(A Royal Air Force Typhoon FGR4 takes off during Red Flag 13-3 at Nellis Air Force Base, Nev., Feb. 27, 2013. The Typhoons are participating in Red Flag at Nellis for the first time, honing tactics and skills necessary in operations among allied forces.)

美国内华达州内利斯空军基地，红旗 13-3 联合空战演习中，美国海军 VAQ-135 电子攻击中队的 EA-18G 滑出维护区。(A U.S. Navy EA-18G Growler assigned to Naval Air Station Whidbey Island taxis with the aircraft wings up for an end-of-runway inspection Feb. 25, 2013, onto the Nellis Air Force Base flight line. The EA-18G aircraft are participating in Red Flag 13-3 to maximize air combat readiness in a realistic training environment.)