180601-N-XP344-0376 NAVAL AIR STATION PATUXENT RIVER, Md. (June 1, 2018) Pilots assigned to the U.S. Navy flight demonstration squadron, the Blue Angels, walk down the flightline prior to a practice demonstration before the Pax River Air Expo on Naval Air Station Patuxent River. The Pax River Air Expo is a public event that showcases Naval Air Station Patuxent River's contribution to the Department of Defense and hte civilian-military relationship it has with the aviation and Southern Maryland communities. (U.S. Navy photo by Mass Communication Specialist 2nd Class Victoria Kinney/Released)