Airman 1st Class Vinicius Santana, Air Force Financial Services Center travel pay technician, raises his right hand to swear allegiance to the United States during a naturalization ceremony at Mount Rushmore National Memorial, S.D., Aug. 21. Five Airmen from Ellsworth took their last step to become citizens of the United States. (U.S. Air Force photo /Airman 1st Class Adam Grant)