There are more-plausible theories of why hijackings are now rare. One of the most plausible is that armored cockpit doors and the policy that they should never

There are more-plausible theories of why hijackings are now rare. One of the most plausible is that armored cockpit doors and the policy that they should never be opened during a hijacking has put hijackers out of business. TSA security checkpoints are a gift to the business models for autonomous vehicles. If you can have your car do the driving for you, an overnight car trip will be a good alternative to flights under 500 miles ad possibly all short-haul flights in the US.