Actually the increased amount of X-rays causes the cigars to become radioactive. ISOMs appear to be particularly susceptible to this problem because of the the soil and environmental characteristics they're grown in. There have been an increasing number of unconfirmed reports of sterility, impotence, hair loss, a rare form of dementia, etc., associated with smoking these. Because of my concerns, I've managed to obtain a license from the Federal Nuclear Regulatory Commission to dispose of these in accordance with their guidelines. So if you have any hesitation about smoking ISOMs that have passed through checked baggage, send them to me and I will dispose of them at absolutely no charge.........Please be advised that I only post this information as a Public Service to you.