Mystery Light Caught on Camera

The white light was seen streaking across the Western sky.
1:53 | 12/23/15

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Transcript for Mystery Light Caught on Camera
Cecilia, thank you and thank you, T.J. That mystery in the sky. That white light seen streaking across the west caught on camera by so many raising a lot of questions as to whether Santa was getting an early start. Nick watt with the story. I have no idea what that is. Reporter: A bird, a plane, the death star? It's like a missile. Reporter: From Las Vegas, Nevada, all the way to Santa Barbara, California, reports and bona fide video evidence shared on social media, a bright white light shooting across the night sky. TV anchors across the west all in a lather. Mysterious. What is this? Reporter: Twitter chatter it landed somewhere between Vegas and death valley denied by the sheriff's office there. Too early for Santa, right? The federal aviation administration, no ideas. The L.A. Police department, we have not had any reports of a weird light. Vandenburg air force base, no scheduled operations around here. Oh, my gosh. Reporter: Something similar happened in southern California early November, a weird inexplicable light turned out to be a U.S. Navy missile tested we weren't aware of ahead of time. Wow. Reporter: Something called the meteor shower is winding down right now. Could be, but that peaked eight or nine days ago. I can't believe we're looking at that. Reporter: I don't know. Santa on a training run perhaps? Okay, this is photoshopped funny but photoshopped. Late last night confirmation it was actually the booster rocket from a Russian mission to the international space station re-entering orbit. For "Good morning America," nick watt, ABC news, Los Angeles. All that. I'm sorry. I got to laugh. He went on for a minute and a half and it turns out -- We were captivated. Saying it's space junk, right? Exactly. Rob, Santa would have trouble

This transcript has been automatically generated and may not be 100% accurate.

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