Required a huge circumference for a simple turn.
UFO's turn on a time at great speeds far in excess of even that of the SR71.
Missed the point completely?
If they could design and fly a plane like the SR 71 back then, that long ago, WTH do they have now?
BTW, I had a neighbor that saw that craft during the Phoenix lights. He worked for Boeing as an engineer.
That engineer isnt the only one who saw that thing. Add thousands of people as well as the Governor of the state and its a bonified siting.
The one that I came across, or came across me, that night in 1979 in the Nevada desert while I was driving between Tonopah and Battle Mountain made all it’s maneuvers at right angles and high speeds, with what seemed to be dead stop on a dime prior to each turn.