On September 11 , 2001 , seven DIA employees lost their lives along with 118 other victims at the Pentagon in a terrorist attack when American Airlines Flight 77 piloted by five Al-Qaeda hijackers plowed into the western side of the building , as part of the September 11 attacks . The death of seven employees at once was the largest combined loss in DIA 's history . On September 11 , 2009 , DIA dedicated a memorial to the seven employees lost in the terrorist attacks on the Pentagon . The memorial is located in the garden at the Defense Intelligence Agency Analysis Center in Washington D.C
September 11 attacks
September 11 attacks
Defense Intelligence Agency