Secretary of Homeland Security Janet Napolitano and Transportation Security Administration (TSA) Administrator John S. Pistole today announced the expansion of TSA Pre√™, a passenger pre-screening initiative, to additional airports across the country following the program’s success at seven pilot locations. "With more than 336,000 passengers screened to date through TSA Pre✓™ lanes, this screening concept enhances security by enabling TSA to focus its efforts on passengers the agency knows less about while providing expedited screening for travelers who volunteer information about themselves prior to flying."