. >> joe pfeiffer was coming with a camera. gideon were making a documentary about the fdny. >> we have a number of floors on fire that look like the plane was aiming towards the building. >> the world trade center tower number one is on fire. >> world trade center 1060, send every available ambulance, everything you got to world trade center now. >> dispatch launched an armada. >> engine 211, lateral 11. engine 44. engine 22, engine 53. >> reporter: 121 engines, 62 ladder companies, 100 ambulances, 750 members of the fdny. >> attention, 64 engine, 50 engine, 94 engine, 83 engine. >> reporter: at the headquarters in brooklyn, the 54-year-old chief of department raced to his car. he was the boss leading the second largest fire department in the world after tokyo. dan nigro was his number two. >> so we went downstairs quickly, got in the car and headed over to the brooklyn bridge where we could see the damage, see the smoke, see the fire. that's when i said to pete, pete, this will be the worst day of our lives. and that was befo