trade center on 9/11 leading his team a fight of artists from letter company three. after the south tower collapsed they ordered firefighters to effectively the north tower. in a recorded radio response, to the order to evacuate the north tower, pat brown said this. >> this is the officer of ladder company three, i refuse the order, i have too many burn people here with me, and i'm not leaving them. >> that is the kind of pain, and loss, and heroism, that is being commemorated on saturday at ground zero by president biden and two former presidents, and thousands of the loved ones of people who lost their lives on 9/11. president george w. bush joins the commemoration in trains ville pennsylvania. we're flight 93 was brought down by the heroic passengers who did not let the hijackers fly that plane to washington where it could've destroyed the capital, or the white house.