Player Embed Code: Download Embed Share Biden Lays Wreath at 9/11 Memorial Defense.gov Sept. 12, 2024 | 3:43 President Joe Biden, Vice President Kamala Harris, Secretary of Defense Lloyd J. Austin III and Joint Chiefs of Staff Chairman Air Force Gen. CQ Brown, Jr., honor those lost in the Sept. 11, 2001, terrorist attacks during a wreath-laying ceremony at the National 9/11 Pentagon Memorial.