Pictures of the duck boat accident

12 of 86: A dove, one of two released following a memorial service flies over the Delaware River, Saturday, July 10, 2010 in Philadelphia near the location where two students from Hungary, Szabolcs Prem and Dora Schwendtner, died in a collision between a tourist boat and a barge on Wednesday, July 7, on the Delaware River in Philadelphia. ((AP Photo/Tom Mihalek))

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