port authority cop david lim was helping evacuees on the 35th floor. >> and now the people i was with were very upset, of course. i just told mem we had to keep going. and we started heading down again. >> at 10:08 a.m., an nypd helicopters pilot reported that tower one wouldn't last month much longer. >> i got down to the fifth floor, well one more flight down, was as far as we got. and the building started coming down.