Tuesday evening, residents across Virginia Beach, Norfolk and Suffolk, Va., dialed 911 to report what sounded what a large explosion. Today, a NASA scientist explained that it might have been a meteor.

The area is home to several military bases, so residents are accustomed to loud sounds. This was out of the ordinary, though; several 911 callers reported a loud noise that rattled their screen doors and windows. One woman told the local television station, WAVY, that it felt like an earthquake.

That's not uncharacteristic for a sonic boom created by a meteor, said Joe Zawodny, a senior research scientist at NASA Langley Research Center.

"There's no doubt in my mind that it's consistent with a supersonic rock, or something else coming in from space," Zawodny said.

I think the sound/rumble was a sonic boom created by the secret X-37b re-entering the atmosphere and landing at NAS Oceana.