On-board security forces foiled a hijacking attempt on an El Al flight from Tel Aviv today. The hijacker is reportedly an Arab with an Israeli airport, and tried to storm the cabin with a penknife. This is scarier than many people may realize. If you’ve ever been through Tel Aviv’s Ben Gurion airport, you know how tight the security is. They search everything on virtually everybody, and give you the third degree. They have to, given the threat Israel faces. On top of that, El Al, the Israeli national carrier, has even stricter security. And still a knife-wielding Arab got on board. If this can happen on an El Al flight originating in Tel Aviv, how safe are those of us on, say, Delta out of LaGuardia? American out of DFW?