A fire on board the U.S. nuclear submarine USS Miami in Portsmouth, Maine on Wednesday night left seven injured and Navy engineers scratching their heads trying to figure out what caused the blaze.


Thankfully, the injuries were minor: Rear Admiral Richard Breckenridge told The Associated Press that nobody was seriously harmed, noting that there were no weapons on the ship and that the submarine's nuclear reactor had been shut down months ago and was not affected.

This video was broadcast by CBS's This Morning on Thursday, May 24, 2012.

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Photo: Anthony Correia / Shutterstock.com.