Nightly News   |  February 23, 2012

Marine choppers collide

Seven U.S. Marines died during a training exercise over a remote area of the California desert. NBC’s Brian Williams reports.

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This content comes from Closed Captioning that was broadcast along with this program.

>>> tonight, investigators are combing through what's left of two military choppers, a cobra and a hughey that kohlited over the southern california desert last night killing seven u.s. marines . six of them were based out of camp pendelton , the seventh out of yuma, arizona. officials say they were preparing for possible deployment for afghanistan.