CDC: Tips From Former Smokers - Mark A.’s Military Service and Illness 

Mark started smoking before joining the Air Force and then continued to smoke through two tours of duty in the Persian Gulf. At age 42, with his risky deployments behind him, Mark was diagnosed with rectal cancer, one of many cancers that are linked to smoking. He now faced the fight of his life. In this video from CDC's Tips From Former Smokers campaign, Mark says his diagnosis brought everything to a grinding halt.
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