Boeing 737, flying Dubai to Tel Aviv on September 30 nosedived from roughly 34,000 feet to about 17,000 after the Omani co-pilot allegedly stabbed Indian captain Smit Machchhar. Smit, bleeding on the cockpit floor, managed to hit the door release, letting Israeli passenger Yaniv Hayun a plumber to enter and subdue the attacker and pull back on the controls before off-duty pilots took over. Everything aviation security built after 2001 was designed to keep a threat from getting into the cockpit the screening, the watchlists, the reinforced door that can be locked from inside and can't be forced from the cabin. That architecture worked perfectly here. It just happened to be protecting the wrong man. The one person it can't screen is the one who already has the keys, and on this flight the hardened door was the main obstacle standing between 180 passengers and the controls of a plane in a dive. The flight landed safely at Tabuk, Saudi Arabia with roughly 174-180 aboard, mostly Israelis; the co-pilot is in Saudi custody.