10:45 p.m. Witnesses Donald F. Stewart and George Tyler III, while riding in a car, observed an object described in detail as a 50 ft flat silver disc with cupola/dome to one side, a porthole and hatch on the dome, approaching their car from ahead to the NE at about 60° elevation,, The edges of the disc were a pale green luminescense (neon-like) and had a luminous aftertrail. The object hovered over their car, "wavered slightly", for approximately 2 minutes, and the auto engine died. They noticed a whirring sound like a vacuum cleaner. One witness got out of car with a Thompson submachine gun considering whether to shoot the disc, companion urged him not to.  Object suddenly turned up on edge seeming to "roll across the sky" faster than a jet to the SW disappearing about 3-1/2 miles away towards Annapolis. Witness claimed car wires "magnetized" and paint cracked. Documents labeled "SECRET INFORMATION". Secy. AF Finletter interest, AFOSI investigation. Hoax? 3 mins. (Hynek UFO Rpt pp. 196-8; Jan Aldrich; FUFOR Index; Loren Gross Jan-May 52 pg. 25)