No successful terrorist attacks on planes going to/from western countries after 9/11/2001, that's a pretty good record. Maybe we can't prove that the security theater was responsible for that, but still, the only planes that were bombed after 9/11/2001 were inside Russia or going from Egypt to Russia.

How many man hours and how much money have we wasted over SREs at <tech company>? Has it been a worthwhile trade off?

- Half kidding but this is what a lot of CEOs/CTOs think, SRE is one of the least invested skills because it is so difficult to prove that they are worthwhile. Similarly they are invested into AFTER a major incident.

Depends who the 'we' is. It worked out great for the airports; increased drink sales means increased rent for airport shops.

no

No hijacked planes, no terror attacks?