This is a memorial dedicated to the victims of the 11 September 2001 attacks on the Pentagon & World Trade Center as well as the airline crews and passengers. I lost a coworker who happen to be working on the WTC observation deck during the attack. His name - David Tirado - is located on the last World Trade obelisk, in the center column, 46 names down from the top (or 26th name from the bottom). We miss him.