By BEN FINLE, Associated Press NORFOLK, Virginia (AP) — In one of the videos, a small object streaks across the sky before the U.S. Navy fighter jet's tracking system locks on and follows it. "Whoa. Got it," the pilot yells, laughing as the dot moves on his screen. "Woohoo!" Another pilot asks: "Wow. What is that, man?" The Navy isn't offering an explanation — at least not publicly — for exactly what