I carry a SureFire everywhere I go. I have carried mine over 10 times on planes since 9/11. I have also carried my SC1 with the extra batteries and bulb. No problems what so ever, eventhough the SC1 looks suspiciously like a mini handgernade. At worst, all you have to do is pull it out and turn on the light. The TSA can be reasonable if you deal with them with respect and openness. They are not the "NAZI's" many here would have you believe.