TEL AVIV -- Homeland Security Secretary Janet Napolitano on Tuesday rebuffed suggestions that U.S. airports should adopt the practices of airports in Israel, calling the Israeli air travel system "a very different model." "We share a common goal, which is to protect the people of our countries from terror or other attacks," Napolitano told Fox News ahead of a tour of security facilities at Tel Aviv's Ben-Gurion International Airport. :But there are many differences in the United States system versus Israel.