The earthquake of January 12, 2010, that left thousands of Haitians dead or homeless and hungry, rocked Haiti's main port of Port-au-Prince. Shockwaves sent the port's busy northern pier and its two massive cargo cranes sinking into the sea. The harbor was littered with toppled shipping containers. The southern pier was sheared from its concrete support pilings. The U.S. military worked with Haitian authorities to offload seaborne humanitarian aid and commercial cargo as it helped run the port. At the heart of its plans was an effort to repair the remains of the southern pier, leaving Haiti with a vital avenue for humanitarian aid and commerce.