Pilots walk past a Lufthansa light aircraft trainer at the Airline Training Center Arizona (ATCA) in Goodyear, Arizona March 26, 2015
Reuters
March 27, 2015 1:29 AM EDT

Numerous airlines hastily changed their policies Thursday to require that two crew members be in the cockpit at all times, after the co-pilot of a Germanwings flight apparently deliberately crashed a plane, killing 150 people, after having locked out the captain.

The U.S. Federal Aviation Administration for many years has required that at least two qualified crew members be in the cockpit throughout every flight. But that’s not the case in other parts of the world.

John Cox, chief executive of Safety Operating Systems, a Washington-based aviation safety consultant, said Tuesday’s crash in the French Alps would likely lead most airlines and national aviation authorities to follow suit…

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