It goes without saying that everything should be done to make aviation as safe as possible. That being said, this seems like a solution that doesn’t actually solve a whole lot. How many people have successfully broken into a cockpit of a commercial airplane in the 20+ years since 9/11? I think zero globally, but someone correct me if I’m wrong. //

Let’s talk about another aspect of the reinforced cockpit door. How many planes have crashed in the past decade due to one pilot being locked out of the cockpit and not being able to get back in? //

To me pilot mental health and one person in a cockpit presents a much bigger risk to aviation than adding a second cockpit door. Admittedly this is more of a global problem than a US problem — at least US airlines are required to always have two people in the cockpit, which is why a flight attendant always has to enter the cockpit when a pilot leaves. This doesn’t apply to foreign airlines flying to the US, though.