Returning from Disney this summer, I had all of my 19 rolls of film out of the canisters and all in a ziploc. I requested a "hand inspection" of this film and I was told it was safe to put thru along with the carry-on. They said you don't want to put it in your checked bags because of the new (since 9-11) x-ray machines, they will ruin it. I also came across a situation that these machines also screen for density. A few years ago I was bringing home Hershey syrup (couldn't find the dark at home, but i could in Fla.). I had it in my checked luggage and because it was so thick, the machine alerted for a hand check. But, anyway, if you put your film in your carry-on, it will be fine. I fly to Fla. every year and have never had a problem with ruined film in a carry-on.....but i also won't pack it in checked luggage either!!