美国俄克拉荷马州阿尔特斯空军基地，美国空军一架 C-17A 运输机在“自由之翼（Wings of Freedom）”开放日中表演空投伞兵。(A member of the U.S. Air Force Academy Wings of Blue parachute demonstration team jumps out of a U.S. Air Force C-17 Globemaster III during the 2014 Wings of Freedom Open House, Sept. 13, 2014. The Wings of Blue demonstration team travels across the country to airshows, sporting events, and other venues to represent the Air Force in precision parachuting.)

美国俄克拉荷马州阿尔特斯空军基地，美国空军一架 C-17A 运输机在“自由之翼（Wings of Freedom）”开放日中。(A U.S. Air Force KC-135 Stratotanker from Altus Air Force Base prepares to land as a U.S. Air Force C-17 Globemaster III taxis to the runway at the 2014 Wings of Freedom Open House, Sept. 13, 2014. The aircraft performed a live aerial refueling demonstration for spectators at this year’s open house.)

美国俄克拉荷马州阿尔特斯空军基地，美国空军雷鸟飞行表演队一架 F-16CM 战斗机在“自由之翼（Wings of Freedom）”开放日中表演。(A member of the U.S. Air Force Thunderbirds performs a fly by during the 2014 Wings of Freedom Open House, Sept. 13, 2014. The Thunderbirds are an important recruiting tool for the Air Force because they demonstrate the professional competence of Air Force members to the public.)