At least 29 people were killed and 56 injured in a tragic road accident in Haiti. By Jacqueline Charles jcharles@MiamiHerald.com At least 29 people were killed and 56 injured after a trucks brakes failed on one of Port-au-Princes busiest streets, a Haitian official said Tuesday. Nadia Lochard of Haitis Civil Protection Office said the accident happened on Route Delmas in the capital when the driver lost control of his dump truck shortly before midnight Monday The truck then crashed into a small bus before careening onto the sidewalk. "It totally destroyed everything in its path," said Frederick Alexis, a freelance photographer who was on the scene and posted photos on Twitter and Facebook. "There were partially destroyed, mangled bodies everywhere." Alexis said the truck, carrying gravel, was traveling down from Delmas 40B when it lost control and crashed in front of the Delimart supermarket. "It got the BBQ chicken lady, the fritay vendors; motorcycles, cars," he told The Miami Herald. President Michel Martelly rushed to the scene, as did Prime Minister Garry Conille, a doctor. He stayed until 2:30 am before going to the State University Hospital, where some of the injured were taken. The accident occurred in front of the national television headquarters. The station broadcast the chaos for hours, during which Haitian National Police offices and Brazilian peacekeepers tried to save victims. Doctors Without Borders, a nongovernmental medical organization, which treated <b>…<b>