SEYMOUR JOHNSON AIR FORCE BASE, N.C. - Senior Airman John Yates, 336th Aircraft Maintenance Unit, inspects hydraulic lines on a F-15E Strike Eagle May 30. The 4th Fighter Wing's mission requires that the Strike Eagles are ready to deliver air power on target, on time whenever America calls. Therefore Airmen of the 4th Maintenance Group maintain these jets 24 hours per day. (U.S. Air Force photo by Senior Airman Jessica Klingler)