U.S. Marines with Special-Purpose Marine Air-Ground Task Force Crisis Response-Africa fly an aerial refueling mission with pilots from the Spanish Air Force, Aug. 13, near Morón Air Base, Spain. While this particular training was a first for the two countries, the U.S. and Spain work together routinely, fostering one of the closest defense partnerships around the world. (U.S. Marine Corps photo by Staff Sgt. Vitaliy Rusavskiy/Released)