A U.S. Air Force dentist performs an examination on a patient at the 633rd Dental Squadron clinic at Langley Air Force Base, Va., July 11, 2013. According to the Centers for Disease Control and Prevention, 23.7 percent of adults between the ages of 20 and 64 have untreated cavities. Most are avoidable, and the clinic recommends Service members brush and floss twice daily and decrease snacking and sipping acidic drinks such as energy drinks and soda. (U.S. Air Force photo by Airman 1st Class R. Alex Durbin/Released)