[spacko]

Which again was a reason for why Germanwings pilot Andreas Lubitz could undisturbedly let the plane crash for committing suicide.

(http://en.wikipedia.org/wiki/Germanwings_Flight_9525)

[dredmorbius]

Ultimately, countermeasures risk becoming attack surfaces.

Indira Gandhi was murdered by two of her own bodyguards.

https://en.wikipedia.org/wiki/Indira_Gandhi#Assassination

[simoncion]

Aye. It is.

As I understand it, FAA regs require that there be two people in the cockpit at all times. So, the Germanwings tragedy would very likely not have happened in the US.

[spacko]

That would be true if at all times meant 100% all times. But I doubt that this rule exists and is assumed to exist to keep the pilot himself from causing harm. But rather to notice medical conditions as soon as possible. So from this psychological stance it is very likely that there will be moments of maybe no more than a minute of someone being alone in the cockpit - realistically.