Fire Sweeps 1 WTC's 88th Floor 84 firefighters responded, put out the flames By Kate Seamons, Newser Staff Posted Aug 8, 2012 7:34 AM CDT Updated Aug 8, 2012 7:48 AM CDT 16 comments Comments In this April 17, 2012 file photo, One World Trade Center, rises above the lower New York City skyline as the National September 11 Memorial can be seen at lower right. (AP Photo/Mark Lennihan, File) (Newser) – A fire broke out this morning on the 88th floor of 1 World Trade Center, the centerpiece of the new WTC complex. The blaze was called in around 7:45am, and 84 firefighters responded. CBS New York reports it was extinguished by 8:30am. The cause and scope of the fire remain unknown at this time, but the FDNY apparently said sparks from welding could be the culprit.