I could write at length about the strange (and leaky) security practices at Egyptian airports, but I'll keep it short. Passing through the Cairo airport, your bags will be x-rayed at the entrance, at a checkpoint past the ticket counter, and again closer to the gate. Security tends to let some items go "around" the machine at some of these points, but at others will insist that everything be X-rayed. 100 speed film went through with no visible fogging. A multilingual sticker stating that the machines are film-safe would have been nice.