Col. David Shank, commander of the 10th Army Air and Missile Defense Command, speaks with Avenger team leader Army Sgt. Jesse Thomas and Avenger team member Army Spc. Dillion Whitlock with Charlie Battery, 2nd Battalion, 63rd Armored Regiment, South Carolina National Guard, during an air-defense live-fire exercise in Shabla, Bulgaria, July 18, 2017. The event comes as part of Tobruq Legacy 17, a multinational air defense exercise that demonstrates interoperability and communication between NATO allies and partners. DoD photo by Marine Corps Staff Sgt. Ben Flores