go_edw. ALL airliners inbound to the USA now require the locked and anti ballistic door. Qantas recently flew an aircraft to the US to park it for good and even that aircraft required the door.
Similarly with jump seat riders, they are still allowed for company 'crew' under VERY strict circumstances. My Dad wouldn't be able to jump seat on my aeroplane to or from the USA.
As for what happens in Europe, I wouldn't know but I'd be dissappointed if their doors were still unlocked.