someone was rising toward melissa doi.rio palmer ran marathons as a hobby. >> battalion 7 is chief palmer. ladder 15 is a team of firefighters a few floors below. >> what do you got up there, pete? >> 74th floor. the walls are breached, so be careful. >> this is ladder 15's lieutenant, joe leavey. >> we're on 71. we're coming up behind you. >> we're also on 75. >> palmer found fire marshal ron bucca on the 75th floor evacuating civilians. >> ladder 15? >> 15. >> firefighters -- knock it down, okay? >> palmer had discovered the only intact stairway to the top of the south tower. unlike the north tower, the second plane had missed stairway a. if palmer could clear this stairwell, 619 souls would have a way out. he was five floors below melissa doi and rising. >> i'm going to die, aren't i? >> no, no, no, no, no. >> i'm going to die. >> ma'am, ma'am, say your prayers. you are not -- >> i'm going to die. >> you got to help each other get off the floor. >> i'm on my way up, orio. >> i'm going to die. >> stay calm, stay calm, st