A U.S. Air Force KC-135 Stratotanker cargo aircraft assigned to the 100th Air Refueling Wing refuels a German air force Tornado aircraft July 17, 2012, over Germany.
The 351st Air Refueling Squadron routinely refueled aircraft of NATO allies. (DoD photo by Senior Airman Rachel Waller, U.S. Air Force/Released). Original public domain image from Flickr