A U.S. Air Force Lockheed EC-121K "Rivet Top" (s/n 57-143184) of the 552nd Airborne Early Warning &amp; Control Wing, based 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. "Rivet Top" operators listened in on radio calls between MiG fighters and their ground controllers.
USAF
circa 1968 <div style="display: none;">date QS:P,+1968-00-00T00:00:00Z/9,P1480,Q5727902</div>
<a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/photos/index.asp">National Museum of the U.S. Air Force</a> photo <a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/shared/media/photodb/photos/2014%5C01%5C140114-F-DW547-012.jpg">140114-F-DW547-012</a>