Updated:A deadly helicopter crash in Peru's Amazon jungle. All seven people aboard died when the aircraft went down on Monday. Among them were five U.S. citizens and two Peruvians. Rescue crews are recovering their bodies. Local media reports said the people on board worked for Petrominerales Ltd, a Canadian-based oil exploration firm focused on Latin America. The helicopter was operated by the local unit of U.S.-based Columbia Helicopters. Columbia's Lima office declined to comment.