An HH-60G Pave Hawk assigned to 33rd Rescue Squadron flies over Republic of Korea air space for Exercise Pacific Thunder 16-2, July 13, 2016. The 33rd RQS comes to Osan AB, ROK, for Pacific Thunder to train their combat search and rescue capabilities. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

Republic of Korea air force 2nd Lt. Wonseog Chung, Air Force Operations Command combined coordinator translator, ROKAF Capt. Hatae Wook, 123rd Fighter Squadron pilot, and Capt. Zachary Krueger, 25th Fighter Squadron pilot, plan a mission for Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 13, 2016. Pacific Thunder is the largest Pacific combined joint exercise in which U.S. and ROK forces train and test combat search and rescue skills. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

U.S. Air Force Maj. Ben Rudolphi, 355th Fighter Wing chief of safety, gives a safety brief to U.S. and Republic of Korea forces before a combat search and rescue scenario during Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 13, 2016. Pacific Thunder is the largest Pacific combined joint exercise in which U.S. and ROK forces train and test combat search and rescue skills. (U.S. Air Force photo by Staff Sgt. Jonathan

SSgt Brandon McCown, 33rd Helicopter Maintenance Unit crew chief, and Master Sgt. Vincent Hnat, 33rd Rescue Squadron special mission aviator, review a preflight checklist before flight during Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 12, 2016. The 33rd RQS is participating in Pacific Thunder, the largest Air Force combined joint combat search and rescue exercise in the Pacific. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

Senior Airman James Turnbull, 33rd Helicopter Maintenance Unit crew chief, and Senior Airman Sheridan McNeil, 33rd HMU aerospace propulsion technician, document post-flight maintenance on an HH-60G Pave Hawk from the 33rd Rescue Squadron before a flight during Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 12, 2016. The 33rd RQS is participating in Pacific Thunder, the largest Pacific combined joint exercise in which U.S. and ROK forces train and test combat search and rescue skills. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

Staff Sgt. Joe Arriza, 33rd Rescue Squadron aerial gunner, looks over a preflight checklist before a combat search and rescue scenario during Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 13, 2016. The 33rd RQS is at Osan to participate in Pacific Thunder, the largest combat search and rescue exercise in the Pacific. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

Senior Airman Gricelda Tomson, 33rd Helicopter Maintenance Unit guidance flight control technician, watches as an HH-60G Pave Hawk assigned to the 33rd Rescue Squadron starts up during Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 13, 2016. The 33rd RQS comes to Osan to participate in Pacific Thunder to train their combat search and rescue capabilities. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

Senior Airman Paul Roberts, 33rd Helicopter Maintenance Unit crew chief, pulls chalks from an HH-60G Pave Hawk assigned to the 33rd Rescue Squadron prior to a flight during Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 12, 2016. The 33rd RQS is participating in Pacific Thunder, the largest Pacific combined joint exercise in which U.S. and ROK forces train and test combat search and rescue skills. (U.S. Air force photo by Staff Sgt. Jonathan Steffen/Released)

An HH-60G Pave Hawk assigned to the 33rd Rescue Squadron takes off during Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 12, 2016. The 33rd RQS is participating in Pacific Thunder, the largest Pacific combined joint exercise in which U.S. and ROK forces train and test combat search and rescue skills. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

An HH-60G Pave Hawk assigned to 33rd Rescue Squadron flies over Republic of Korea countryside during Exercise Pacific Thunder 16-2, July 13, 2016. The 33d RQS comes to Osan AB, ROK, for Pacific Thunder to train their combat search and rescue capabilities. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

Staff Sgt. Adam Pope, 33rd Rescue Squadron flight engineer, looks out over Republic of Korea countryside during a combat search and rescue scenario for Exercise Pacific Thunder 16-2 at Osan Air Base, Republic of Korea, July 13, 2016. Pacific Thunder is the largest Pacific combat search and rescue exercise designed to test ROK and U.S. forces on their ability rescue a downed pilot behind enemy lines. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

An HH-60G Pave Hawk assigned to 33rd Rescue Squadron flies over Republic of Korea countryside during Exercise Pacific Thunder 16-2, July 13, 2016. The 33rd RQS comes to Osan AB, ROK, for Pacific Thunder to train their combat search and rescue capabilities. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)

Senior Airman Paul Roberts, 33rd Helicopter Maintenance Unit crew chief, guides in an HH-60G Pave Hawk assigned to 33rd Rescue Squadron after flying a combat search and rescue training mission at Osan Air Base, Republic of Korea, July 13, 2016. The 33rd RQS plans to test their combat search and rescue skills at Exercise Pacific Thunder 16-2 at Osan. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)