A U.S. Marine Corps F/A-18D Hornet aircraft assigned to Marine All Weather Fighter Attack Squadron (VMFA(AW)) 533, Marine Aircraft Group 31, 2nd Marine Aircraft Wing refuels in the air over Guam Sept. 17, 2014, during exercise Valiant Shield 2014.
Valiant Shield is a biennial U.S. Air Force, Navy and Marine Corps exercise held in Guam, focusing on real-world proficiency in sustaining joint forces at sea, in the air, on land and in cyberspace. (DoD photo by Lance Cpl. Hernan Vidana, U.S. Marine Corps/Released). Original public domain image from Flickr