Respirator Check Air Force Maj. John Ricciardi, a registered nurse assigned to medical response team Colorado, tests the seal on a respirator at Poudre Valley Hospital, Fort Collins, Colo., Nov. 22, 2021. SHARE IMAGE: Download Image: Full Size (3.52 MB) Tags: Army, Air Force, coronavirus, covid19vaccine Photo By: Army Sgt. 1st Class Timothy Hughes VIRIN: 211122-A-XH946-0003.JPG Photo Gallery