Radar: MS of oscillating disk antenna. Various shots of radar stations showing buildings, radomes, snow on ground, a few bare trees. Still and TRAVELLING LSs of radar station, snowy field, trees. CUs of revolving scanner inside radome. Several CUs of dark radarscope, scanning beams visible. Shots of personnel at radarscopes in plotting room, clock on wall. Shot of "restricted" sign. HAMLS and CU of plotting map, of personnel at work. HAS of tarmac, of Mitchell bombers, "Expediters", CF 100's revving up. Shot of tarmac from control tower, of operator and controls. Sequence showing "Albert", "Vampires" taking off, CF 100's. Front AIR TO AIR SHOT of CF 100's. LAS of pilots in ready room, scrambling to CF 100 jet.