Player Embed Code: Download Embed Share Sunrise Flag Unfurling at Pentagon Marks 9/11 Anniversary Defense.gov Sept. 11, 2019 | 20:22 The U.S. flag is unfurled at sunrise on the west side of the Pentagon near the 9/11 Memorial in honor of those killed in the 9/11 terrorist attack, Sept. 11, 2019. The flag unfurling marks the anniversary and will be followed by both private and public ceremonies.