PRESSURIZATION TEST U.S. Air Force Staff Sgt. Chris Wietecha, left, and Tech. Sgt. Christopher Walls conduct a pressurization test on a KC-135 Stratotanker aerial refueling drogue, March 25, 2008. The men are assigned to the 452nd Maintenance Squadron. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 240728-Y-HIO76-819.jpg Photo Gallery