ASSOCIATED PRESS Emergency vehicles can be seen at the top left as traffic backs up at the scene of a commuter bus crash on Interstate 270, Wednesday, Sept. 29, 2010, in Bethesda, Md.
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ASSOCIATED PRESS Emergency vehicles can be seen at the top left as traffic backs up at the scene of a commuter bus crash on Interstate 270, Wednesday, Sept. 29, 2010, in Bethesda, Md.
