William Rodriguez's story

On 9/11, Rodriguez single-handedly rescued fifteen (15) persons from the WTC, and as Rodriguez was the only person at the site with the master key to the North Tower stairwells, he bravely led firefighters up the stairwell, unlocking doors as they ascended, thereby aiding in the successful evacuation of unknown hundreds of those who survived.

Rodriguez, at great risk to his own life, re-entered the Towers three times after the first, North Tower impact at about 8:46 A.M., and is believed to be the last person to exit the North Tower alive, surviving the building's collapse by diving beneath a fire truck. After receiving medical attention at the WTC site for his injuries, Rodriguez spent the rest of 9/11 aiding as a volunteer in the rescue efforts, and at dawn the following morning, was back at Ground Zero continuing his heroic efforts.
911keymaster.com