Swift Response Soldiers participate in Swift Response 21, a joint, multinational airborne operation at Boboc Air Base, Romania, May 10, 2021. Swift Response 21 is the first exercise of the larger operation Defender-Europe 21 during which U.S. forces work closely together with NATO allies and partners. SHARE: Download: Full Size (0.85 MB) Credit: Army Sgt. Catessa Palone VIRIN: 210510-A-HK139-838M.JPG Photo Gallery