check out
www.emirates.com schedule for all your answers.
as for americans... you would have to ask one.
I will point out though that Americans aren't the only people in the world capable of being blown up.
If the question is, are our security concerns as pilots greater when operating into our local neighbouring countries than else where? My answer would have to be generally no. However the unannounced fly overs and bombings by the Izraelie airforce is another matter entirely.