"9/11 E-Men Heroes" - New York City’s elite ESU is a unique institution in law enforcement made up of around 300 highly specialized officers trained in search and rescue, building collapse and heavy weapons and hazardous materials containment. Of the 31 E-Men who rushed into the World Trade Center on that fateful day, only 17 survived. The 14 E-Men who perished were among 60 law-enforcement personnel who died on 9/11, the worst single day in US police history. Despite their devastating losses, the brotherhood of New York's E-Men has emerged stronger than ever and they are finally ready to tell their story. (Source: Discovery)