The U.S. ambassador called for better security from Venezuelan authorities Thursday, a day after a hostile protest threatened him and his delegation during a trip outside the capital. U.S. Ambassador William Brownfield and his delegation were blocked from entering a social club Wednesday by supporters of President Hugo Chávez. The protesters also burned a U.S. flag and set tires ablaze in the town of San Juan de los Morros, some 50 miles southwest of Caracas. Full Story