美国空军一架 F-22A 战斗机在“格子旗-2014”演习中从廷德尔空军基地起飞执演。（A U.S. Air Force F-22 Raptor from the 3rd Wing, Elmendorf Air Force Base, Alaska, takes off for a training sortie during exercise Checkered Flag, Dec. 8, 2014, at Tyndall Air Force Base, Fla.）

美国空军一架 F-16CM 战斗机在“格子旗-2014”演习中飞越廷德尔空军基地。（A U.S. Air Force F-16 Fighting Falcon flies a training sortie in support of exercise Checkered Flag, Dec. 9, 2014, near Tyndall Air Force Base, Fla.）

美国空军一架 F-16CM 战斗机在“格子旗-2014”演习中飞越廷德尔空军基地。（A U.S. Air Force F-16 Fighting Falcon flies a training sortie in support of exercise Checkered Flag, Dec. 9, 2014, near Tyndall Air Force Base, Fla.）

美国空军一架 F-16CM 战斗机在“格子旗-2014”演习中飞越廷德尔空军基地。（A U.S. Air Force F-16 Fighting Falcon flies a training sortie in support of exercise Checkered Flag, Dec. 9, 2014, near Tyndall Air Force Base, Fla.）

美国空军第2战斗机训练中队（2FTS）一架 T-38A 教练机在“格子旗-2015”演习中飞越廷德尔空军基地。（A U.S. Air Force T-38 Talon from the 2nd Fighter Training Squadron, flies a training sortie in support of exercise Checkered Flag, Dec. 12, 2014, over Tyndall Air Force Base, Fla.）

美国佛罗里达州廷德尔空军基地附近空域，美国空军第2战斗机训练中队（2FTS）一架 T-38A 教练机在“格子旗-2015”演习中。（A U.S. Air Force T-38 Talon from the 2nd Fighter Training Squadron, flies a training sortie in support of exercise Checkered Flag, Dec. 12, 2014, near Tyndall Air Force Base, Fla. (U.S. Air Force photo by Tech. Sgt.）

美国佛罗里达州廷德尔空军基地附近空域，美国空军第2战斗机训练中队（2FTS）一架 T-38A 教练机在“格子旗-2015”演习中。（A U.S. Air Force T-38 Talon from the 2nd Fighter Training Squadron, flies a training sortie in support of exercise Checkered Flag, Dec. 12, 2014, near Tyndall Air Force Base, Fla. (U.S. Air Force photo by Tech. Sgt.）

美国佛罗里达州廷德尔空军基地附近空域，美国空军第2战斗机训练中队（2FTS）一架 T-38A 教练机在“格子旗-2015”演习中。（A U.S. Air Force T-38 Talon from the 2nd Fighter Training Squadron, flies a training sortie in support of exercise Checkered Flag, Dec. 12, 2014, near Tyndall Air Force Base, Fla. (U.S. Air Force photo by Tech. Sgt.）