Moment of Silence Deputy Defense Secretary Kathleen Hicks and Navy Adm. Christopher W. Grady, vice chairman of the Joint Chiefs of Staff, observe a moment of silence during a 9/11 memorial observance ceremony for employees at the Pentagon, Sept. 10, 2024. SHARE: Download: Full Size (0.76 MB) Tags: 9/11, hicks, deputy defense secretary, vice chairman, grady Credit: Air Force Tech. Sgt. Jack Sanders, DOD VIRIN: 240910-D-XI929-2020.JPG Photo Gallery