Quote Originally Posted by NikoSperi
Xray exposure is cumulative, so while one machine may be film safe, send your film through it enough times and you will see fogging. Your trip from RI to Beirut is going to involve one if not more connections, so you're going to go through about 6 machines at a very minimum.
In 2000, I flew round trip from Hawaii to Amman, Jordan. I changed planes in Los Angeles, New York and London. Each time I had my film, Fuji Velvia 50 (40 rolls), run through the x-ray machine with no problems.