Siller then strapped 60 pounds of gear to his back and raced on foot to the Twin Towers ... The Tunnel to Towers 5K Run and Walk began in 2002 with 1,500 people, and is considered to be one ...

Two planes hit the Twin Towers of the World Trade Center in New York, with the second strike 17 minutes after the first. The buildings were set on fire, trapping people on the upper floors ...