Barge

Unidentified people are escorted to an ambulance at the scene of a tourist boat accident on the Delaware River in Philadelphia on Wednesday.

(Matt Rourke/Associated Press)A tourist boat carrying 37 people overturned on the Delaware River in Philadelphia on Wednesday afternoon when a barge hit it, leaving two people unaccounted for and the extent of injuries unclear after a frantic rescue effort.There were 37 people were on the amphibious "duck boat" when it was struck, and two Coast Guard boats were rescuing people from the water, with police and fire crews assisting, Coast Guard Senior Chief Bud Holden said..

Source: http://www.cbc.ca/world/story/2010/07/07/tourist-boat007.html