Sgt. Nick Grimm, U.S. Army Parachute Team “Golden Knights” member, descends to the ground during the 2017 Joint Base Andrews Air Show: America’s Air & Space Expo at JBA, Md., Sept. 17, 2017. The air show commemorated the Air Force's 70th anniversary, and showcased airpower through aerial performances and static displays. (U.S. Air Force photo by Airman 1st Class Valentina Lopez)