EMERALD EXERCISE As seen through a night-vision device, a helicopter lifts off as Navy SEALs attack a simulated enemy threat during Operation Urban Corkscrew, part of Emerald Warrior 2013, on Camp Shelby, Miss., April 29, 2013. The SEALs extracted two simulated downed helicopter pilots and returned them to safety during the operation. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 293979-Y-DQB02-193.jpg Photo Gallery