Trump and several aides secretly entered the truck through the aircraft door, were lowered to the ramp and driven across the airport to a waiting US Air Force C-32A. The C-32A carrying Trump used the military call sign RCH18, or Reach 18, rather than Air Force One, and was not readily visible on public flight-tracking services. Air Force One is not the name of a particular airplane. It is the call sign normally assigned to any US Air Force aircraft carrying the president. President Bill Clinton flew into Pakistan aboard an unmarked aircraft in 2000 while the more recognizable Air Force One served as a decoy.