Following up on that Virginia mystery boom,
“The mysterious boom and flash of light seen over parts of Virginia Sunday night were not caused by a meteor, but rather by exploding space junk from the second stage of a Russian Soyuz rocket falling back to Earth, according to a spokesman for the U.S. Naval Observatory.”
http://www.msnbc.msn.com/id/29958635/ns/technology_and_science-space/t/mystery-flash-traced-russian-space-junk/