AS IT HAPPENED - The 9/11 Pentagon Attack

Timothy Joseph "Tim" Maude (November 18, 1947 – September 11, 2001) was a United States Army officer who was killed in the September 11 attacks of 2001.

Maude, a lieutenant general, was the highest ranking U.S. military officer killed in the September 11 attacks and the most senior U.S. Army officer killed by foreign action since the death of Lieutenant General Simon Bolivar Buckner, Jr. on June 18, 1945, in the Battle of Okinawa during World War II. Maude had been serving as the U.S. Army's Deputy Chief of Staff for Personnel and was at a meeting when American Airlines Flight 77 crashed into the west side of the Pentagon. His offices had just days before been moved to the most recently renovated section of the Pentagon.
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https://en.wikipedia.org/wiki/Timothy_Maude