Makes me laugh when guys from the US go looking elsewhere when others can't go to the US and work. An open and free market is great, so why does the US consider their homeland security so important than other nationalities couldn't possibly be trusted? Why wouldn't the same apply in Oz or Canada or anywhere else for that matter?
We have already had a discussion regarding this security issue..
Needless to say that answers why USA requires citizenship for ATCOs job are stupid,at least...
Could you imagine that some North Korean guy,working on KJFK cleranace delivery says:
United yx cleared to ....