Customs and Border Protection agent Bob Schulze checks a passport at the vehicle crossing at the San Ysidro Port of Entry June 1 2009 in San Ysidro...
{"Image ImageDescription": "SAN YSIDRO, CA-, JUNE 1:  Customs and Border Protection agent Bob Schulze checks a passport at the vehicle crossing at the San Ysidro Port of Entry June 1, 2009 in San Ysidro, California.  The Western Hemisphere Iniative (WHTI) was put into effect today at all Canadian and Mexican border crossings where visitors and residents must present an approved travel document when entering the U.S. at any land or sea ports of entry. These travel documents include a U.S. passport or passport card, as well as a Trusted Traveler Card (SENTRI, NEXUS or FAST) or an Enhanced Driver's License.  (Photo by Sandy Huffaker/Getty Images)", "Image Copyright": "2009 Getty Images"}