Rogue Pilots Are a Growing Safety Threat. No One Knows How to Stop Them.

U.S. aviation officials and industry insiders have long whispered about a deadly problem with air travel: rogue pilots with severe mental health issues intentionally crashing planes. WSJ’s Andrew Tangel reports on why this issue is a struggle for the airline industry, why pilots are afraid to ask for help and how engineers are trying to solve the problem. Ry…