new system of screening travelers entering the United States significantly would enhance U.S. defenses against terrorism, says Paul Rosenzweig, acting assistant secretary for policy development at the U.S. Department of Homeland Security. The Western Hemisphere Travel Initiative (WHTI) would require anyone crossing into the United States by land, air or sea first to present secure documentation that shows identity and nationality, Rosenzweig told the House Judiciary Committee's Immigration Subcommittee June 8. The initiative would require U.S. and Canadian citizens to do what citizens of most countries always have had to do when crossing national borders, he said. By requiring that...