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THE WEEK IN PHOTOS (3/4/12-3/10/12)

Crushed vehicles and semi-trailers sit on Highway 20, Monday, March 5, 2012, after chain-reaction collisions occurred involving nearly two-dozen vehicles near Webster City, Iowa. Authorities are blaming the pileups on poor visibility due to fog and thick, black smoke billowing from burning hay bales nearby. Eight people were hospitalized, two are reportedly in serious condition. (AP Photo/The Messenger, Jessie Helling)

Credit: AP