An Airman holds an electronic cigarette at Scott Air Force Base, Ill., Aug. 13, 2014. The Centers for Disease Control and Prevention is investigating the more than 2,000 cases of e-cigarette, or vaping, product use associated with lung injury that have occurred across the country. (U.S. Air Force photo by Airman 1st Class Erica Crossen)

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Photo by: Airman 1st Class Erica Crossen |  VIRIN: 140813-F-BD468-007.JPG