As Charlie Vitchers looks back over the last decade and remembers nine months overseeing the cleanup of the World Trade Center after the Sept. 11 , 2001, terrorist attacks, he vividly recalls countless examples of selflessness during New York City's darkest hours.

As the "go-to guy" for the hundreds of people and numerous agencies involved in the massive effort to remove rubble after hijacked jetliners crashed into the Twin Towers and debris spread over a wide area, he readily recalls the details.

"There is not a day that goes by that I don't think about 9/11," he said in a recent interview near the site, emphasizing the toll the cleanup took on everyone involved in the lengthy and complicated process.