Another thread has posted TSA regulations and suggestions for packing and checking items.
One comment re: "As we all know, the Arabs have ...." is an inaccurate slander of a whole group of people, of whom only a minority have hostile intent.
About a week ago I entertained student visitors from the mid East who all spoke Arabic, but coming from places as distant as Morocco and Qtar they have many different backgrounds and indeed said they had difficulty understanding each other's accents. These were great young people who are aware of the problems of the world, but were serious about learning and meeting people and improving the world.
In my personal opinion it's religous radicals on all sides who have been creating holy wars in that area for over a thousand years: Muslims, Jews and Christians and I don't see that any one group is much better than the others.
I share the view that wackos who try to blow up airplanes, crash into the WTC etc. are despicable.
However, Arab people in Qtar reportedly host a large US military base and provide a place for R&R for US soldiers, as may other Arab countries. We need to be nice to friendly Arab countries.
Enough on politics. Time to get back to photography.