An officer for ICE wears a shoe-covering made from carpeting, used by smugglers to make it difficult...
Kevin Carlos, a supervisory patrol officer for ICE (Immigration and Customs Enforcement), wears a shoe-covering made from carpeting, used by smugglers to make it difficult for agents to track them as they cross the Sonoran desert, near Sells, Arizona, February 1, 2007. The Shadow Wolves, an elite group of Native American trackers that use skills handed down from the ancestral hunt is being tapped to play a larger role in securing the United States' borders. Picture taken February 1, 2007. REUTERS/Jeff Topping (UNITED STATES)