The original content of Democracy Now! Headlines appears under the Creative Commons BY-NC-ND 3.0 License (United States). For more, including their other shows and media, visit www.democracynow.org. September 23, 2009 Shootout Prompts Closure of US-Mexico Border Crossing ----------------------------------------------------- The US sealed off a border crossing with Mexico Tuesday after a shootout involving alleged Mexican human traffickers. On Tuesday, armed assailants opened fire on US agents in an incident at the San Ysidro crossing between Tijuana and San Diego. The agents had stopped three vans believed to be carrying undocumented immigrants. Three people in the vans were wounded along with a motorist in another vehicle. .