The secretive 737 radar jet known as 'RAT55' has begun a new phase in its career. It has been spotted in relation to the Artemis II mission and has been seen rehearsing with other aircraft, including a WB-57. The aircraft's activities and future role are unclear, with some outlets speculating about its potential involvement with NASA or a possible new role as an airborne early warning radar jet, possibly for a country other than the one it was previously associated with.