Watch live: Trump commemorates 25 years since 9/11 in Pentagon speech

President Trump will speak at the Pentagon on Friday morning to commemorate the 25th anniversary of the Sept. 11, 2001, terrorist attacks in New York City, Arlington, Va. and Pennsylvania. A total of 2,977 victims died in the tragic incidents. At the Pentagon alone, 184 lives were lost after American Airlines Flight 77 crashed into the building.