NEW ORLEANS - Robert Hecker, Chief of Police for the Harbor Police Department Port of New Orleans, explains the role of HPD on the Mississippi River to Nicholas John Fray, Maritime Security Coordinator for the South African Security Agency, Sept. 23, 2011. An HPD 96-foot response boat and crew escorted Fray and Nico Du Plessis, National Chief Security Officer for Transnet Ports Terminal in South Africa, along the Mississippi River to learn about safety and security along the river. U. S. Coast Guard photo by Petty Officer 3rd Class Casey J. Ranel.