From an article here: http://www.cleveland.com/world...
the Israeli model worked because Israeli agents “try to detect behavior or people’s patterns” by asking them questions.
Israeli officials say that any passenger trying to board El Al is subject to questions from security agents.
“Everybody gets asked, who you are, where are you traveling to,” one Israeli official said, speaking on grounds of anonymity because he did not want to speak publicly about the security measures. The agents asking the questions, he said, “are very well trained. Depending on what you say, they will put you through an additional screening.” Baker said: “Israeli agents focus on the traveler’s country of origin, their profession, visas that are stamped in their passports, places they have visited, people they know and the color of their skin. If you say you’re a Renaissance art scholar, they’ll ask you if you know who Titian is.” Mica maintained that the Israeli system was not profiling. “Someone is trained to do it with people who warrant further scrutiny,” he said. Some travelers say they would rather go through a full body scan than the system at Ben-Gurion airport. “My experience leaving Tel Aviv was by far and away the most unpleasant encounter I’ve ever had with airport security officials in the decade,” said Matthew Yglesias, a blogger with the Center for American Progress who said it took three hours last month for him to get from the initial security check at Ben-Gurion to the food court. “As best I could tell, things went pretty smoothly as long as you were Israeli, traveling with an Israeli or traveling with some kind of well-established tour group.” Yglesias was traveling with a group of journalists. “The African-American woman in our group was taken off to be questioned. A bunch of us were told we couldn’t bring iPads on the plane,” he said. He said that the Jewish member of his group “had the easiest time; the black woman had the hardest time.”