E-4B milestone
The E-4B is the National Airborne Operations Center, based at Offutt Air Force Base, Neb., supports the president, secretary of defense and chairman of the Joint Chiefs of Staff. The alert crew comprises 21 joint-service battle staff members along with an Air Force aircrew, maintenance, security and communications personnel. The aircraft passed a significant milestone this month by sitting alert constantly for more than 35 years. (U.S. Air Force photo/Lance Cheung)