In an unsettling trend, many flights around the world are running into a dangerous problem called GPS spoofing. This issue is raising alarms among pilots, airline officials, and air safety experts. GPS spoofing involves sending fake signals that trick aircraft systems into believing they are in a different location or altitude. This can lead to serious confusion in the cockpit, putting pilots and passengers at risk.

A Close Call in the Cockpit

Captain Dan Carey, who flies a Boeing 777...