Help with 9/11 documentary title plz? SOLVED

I recall it as two French brothers doing a vid documentary about 1st Battalion FDNY firefighters in Manhattan and were thus still engaged on 9/11. They managed to follow the firefighters around during the attack. I also recall, maybe incorrectly for this documentary, that one brother was with a group of firemen as they made their way into the lobby of WTC 1 while bodies were hitting the ground nearby when the tower collapsed on top of them. All survived except a fire dept. chaplain.