Agreed. I believe there are two major threats to air safety, neither of which has been sufficiently addressed. 1. crazy pilot scenario - as illustrated recentl

Agreed. I believe there are two major threats to air safety, neither of which has been sufficiently addressed. 1. crazy pilot scenario - as illustrated recently by Germanwings Flight 9525. All we can do is make sure one pilot can't lock out the other pilot, and screen more carefully for mental illness. There's no room for political correctness and fairness in this picture; someone with depression and suicidal tendencies, as this 9525 pilot was known to have, should never be in the cockpit, period full stop. 2. Stinger scenario - one man with a shoulder launched anti-aircraft weapon could take down a jet liner. The world is flooded with these weapons and it's just a matter of time. Someone tried to take down an Israeli passenger jet in Sinai a few years ago, but fortunately missed. It seems unlikely in the U.S. but think of the thousands of airports all over the Middle East, Africa, central Asia, etc. It's bound to happen sooner or later, unfortunately. The only solution is to install defensive systems on jets, an expensive necessity in today's world.