Shown here is a U.S. Air Force Lockheed EC-121K Rivet Top (s/n 57-143184) of the 552nd Airborne Early Warning & Control Wing at Korat Royal Thai Air Force Base, Thailand, in 1967/68. "Rivet Top" was a modification of a EC-121 into a Airborne Tactical Air Coordination Center, where intelligence collection and command and control functions were fused on a single airframe. For this a former U.S. Navy EC-121K (BuNo 143184) was modified. Photo U.S. Air Force employee
