Thousands of American military personnel are landing in Haiti, but who they'll report to when they get there is still up in the air as the government may no longer be in existence. Already weak and held together with U.N. peacekeeping forces before the quake, the disaster has left large swaths of the country without clear authority. Haitian President Rene Preval survived the destruction of his palace, but an unknown number of legislators and government officials may have been killed when Parliament and ministry buildings collapsed, the Christian Science Monitor reports. “There’s no question that the Haitian Government is challenged,” State Department spokesman Philip Crowley said. “They have received a very serious blow.” He added that part of the U.S. mission in Haiti is to rebuild its government's capacity.