I have seen alot of aircrafts fly by my house because i live near Fort Hood, and never did my radio go out.Me and my close friend where returning to my home when we spotted a weird shaped and silent object hoovering in the sky. It was quite big, the biggest flying object ive ever seen. It made several turns without banking like a normal aircraft, and kept constant speed as it turned. We watched it for about five min. Also the radio went in and out a couple times before it dissappeared into the night sky. We also noticed about six or seven helicopters following it about two to three miles apart.