Mark A. Milley, Army Gen. Mark A. Milley, chairman of the Joint Chiefs of Staff, speaks during the Defense POW/MIA Accounting Agency ceremony commemorating the 20th Anniversary of the Mi-7 Tragedy in Vietnam at the Pentagon, April 7, 2021. A team of seven American and nine Vietnamese service members, were killed in a helicopter crash in Vietnam on a mission to recover fallen U.S. service members. SHARE IMAGE: Download Image: Full Size (1.65 MB) Photo By: Navy Petty Officer 1st Class Carlos M. Vazquez II, DOD VIRIN: 210407-D-WD757-1768.JPG Photo Gallery