Going forward, I think every exit row pax has to be ready to pull open that emergency exit while the plane is still in the air and every pax sitting in a front cabin aisle seat has to realize that his/her body is the last line of defense to the cockpit in the event of a hijacking. It's no longer just about extra leg room. This, of course, assumes that all pilots have passed thorough background checks and the cockpit is in secure hands.