TIJUANA, Mexico, Nov. 25 (UPI) -- The United States closed the San Isidro Point of Entry on the California-Mexico border Sunday, as thousands of migrants traveling in a caravan from Central America arrived. The migrants were waiting to cross the border when U.S. Customs and Border Protection announced via loudspeaker that the port of entry was closed. Pandemonium ensued, with many migrants storming through downtown Tijuana, looking for another way over the border. Thousands more people who were marching in support of the caravan added to the confusion in the crowds. Mexican authorities were overwhelmed. U.S. Navy and CBP helicopters...