don't think they were in uniform, but they were blocking, physically blocking entrance to the wooden escalators on our left, the ones that directly go to the train. we thought, that's strange. it was actually a tiny bit hazy in there, too. we noticed that, too. a little smoky. >> firemen see a small fire burning halfway up the escalators bringing passengers from the tracks up to the ticket hall. >> a very experienced fire officer looked down the escalator and assessed the fire as being, it is about the size of a cardboard box. >> but firefighter colin townsley spots something he believes is dangerous. he calls firefighters above ground, asking for more equipment and saying, people are in danger. >> he, through his experience, had seen something going on