Feds Finally Acknowledge 9/11 First Responders' Cancers

Eleven years ago on Sept. 11, thousands of American workers rushed to New York's World Trade Center to try and help rescue the victims of the terrorist attacks on the twin towers. In the aftermath of the 9/11 plane crashes that brought down the buildings and killed nearly 3,000 people, the work effort became a search for victims' remains as well as a major cleanup operation. The cleanup at the site was officially completed on June 30, 2002.