meanwhile, albert m. chop, the press spokesman for project blue book, arrived at national airport and, due to security concerns, denied several reporters' requests to photograph the radar screens. he then joined the radar center personnel. by this time (9:30 p.m.) the radar center was picking up unknown objects in every sector. at times the objects traveled slowly; at other times they reversed direction and moved across the radarscope at speeds calculated at up to 7,000 mph (11,250 km/h). at 11:30 p.m., two u.s. air force f-94 starfire jet fighters from new castle air force base in delaware arrived over washington. captain john mchugo, the flight leader, was vectored towards the radar blips but saw nothing, despite repeated attempts. however, his wingman, lieutenant william patterson, did see four white "glows" and chased them. he later said that "i tried to make contact with the bogies below 1,000 feet. i was at my maximum speed...i ceased chasing them because i saw no chance of overtaking them." according to albert chop, when ground control asked patterson "if he saw anything", patterson replied "'i see them now and they're all around me. what should i do?'...and nobody answered, because we didn't know what to tell him."