The 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.
Made by BoeingBoeing Military Airplanes Division.
It is the successor of the Boeing C-135 Stratolifter ,
Boeing WC-135 Constant Phoenix is the predecessor of the Boeing OC-135B Open Skies.