The U.S. Transportation Security Administration said it began domestic air passenger watch list matching as part of the Secure Flight program

. TSA assumed those responsibilities from four airlines, with additional transfers planned for "the coming months." A second phase covering international flights operated by U.S. and non-U.S. airlines--now handled by U.S. Customs and Border Protection--is scheduled to begin "in late 2009." The Secure Flight program requires travel agencies to adapt their systemsin order to collect specific passenger information.