Boeing WC-135 Constant Phoenix

The Boeing WC-135 Constant Phoenix is a special-purpose aircraft derived from the Boeing C-135 and used by the United States Air Force. Its mission is to collect samples from the atmosphere for the purpose of detecting and identifying nuclear explosions. It is also informally referred to as the "weather bird" or "the sniffer" by workers on the program and international media respectively.

United States

 * United States
 * United States Air Force x 10 - 2 currently in active service

Related Development

 * Boeing C-135 Stratolifter
 * Boeing KC-135 Stratotanker
 * Boeing NC-135
 * Boeing OC-135B Open Skies
 * Boeing RC-135

Comparable Aircraft

 * Lockheed WC-130