Carter Remarks Defense Secretary Ash Carter speaks during a National Guard Bureau change-of-command ceremony at the Pentagon, Aug. 3, 2016. Air Force Gen. Joseph L. Lengyel took over as chief of the bureau during the ceremony, succeeding Army Gen. Frank Grass. DoD photo by Navy Petty Officer 1st Class Tim D. Godbee SHARE: Download: Full Size (1.13 MB) Credit: Navy Petty Officer 1st Class Tim D. Godbee VIRIN: 160803-D-SK590-186A.JPG Photo Gallery