A converted C-135B. Assigned to the 55th Weather Reconaissance Squadron at McClellan AFB in Sacramento California. Shown at RAF Mildenhall during Operation Desert Storm. Note the Starcast Camera window on the cargo door and the air sampling foil on the side of the fuselage. This aircraft is no longer designated a WC-135. It under went modifications and is now designated an OC-135 and flies missions in support of the Open Skies treaty.