Page two of this teletype message below says:
ITEM TEN EIGHT FOXTROT NINE FOUR ACFT IN
LOCAL AREA UNDER GCI CONTROL CLIMBING TO
INTCP BRAVO THREE SIX ACFT ENTERING AREA
FR NE PD THESE ACFT OVER FLD TWO ZERO MIN
LATER THAN SIGHTINGS PD.
(Item 10: Eight F-94 aircraft in local area under Ground Control Intercept climbing to intercept B-36 aircraft entering area from northeast. These aircraft over field (Selfridge) 20 minutes later than sightings (UFOs).
The Teletype goes on to say:
Edward A. Wilson, 10555 Halcott, Ferndale, Michigan, member of AFROTC, at 1045 EST observed one object like the ones described above
(round, white objects flew straight and level, very fast), over B-36 formation traveling south to north.
These B-36 aircraft are no doubt the B-36's from the 7th Bombardment wing on their mock bombing attack on Detroit, on this day 27 July 1952.
Archived version on NICAP site:
JOINT SAC/ADC EXERCISEThe next flying exercise took place on 27 July, as the wing launched 21 B-36s (7-9th, 7-436th and 7-492nd Bomb Squadron) from Carswell, as part of a joint SAC/ADC attack on Detroit, Michigan. Enroute to Detroit, the bombers were intercepted by Air Defense Command North
American F-86 and Lockheed F-94 fighters. The North American F-86 Sabre was the Air Forces first swept-wing fighter, entering operational service in February 1949. The Lockheed F-94 Starfire was the first jet-powered all-weather fighter to enter service with the Air Force and first to feature a speed-boosting afterburner. It became operational in May 1950 with the Continental Air Command. Fighter opposition was considered ineffective as all bombers attacked the target then returned to Carswell the same day.