You're right about the new X-ray machines, but they're used for checked baggage. Supposedly, film under 1000 ASA can safely go through the X-rays with your carry- on baggage, but I always ask for a hand check. Unfortuneately, not all airports will do hand checks. I suggest that you ask VERY nicely for a hand check, and put the TMZ in lead bags in case they make you put the film through the X-ray. Chances are the Tri-X will be OK.(posted 8488 days ago)