Here's what they witnessed, according to the two Super Hornet pilots, Cmdr. David Fravor and Lt. Cmdr. Jim Slaight. They were on a routine training mission in their F/A-18s that day when they were asked by the Princeton to investigate an unidentified airborne contact. Unknown to either of the pilots, for days the Princeton had been tracking multiple returns, always over the same lat/long spot, descending from somewhere above 80,000 feet down to 20,000 feet to a hover in a matter of seconds. The Princeton had been using its SPY-1 radar to track the objects while they descended, hovered and then zipped away at speeds, turn rates and accelerations that seemed unfathomable.