9 life-saving tools firefighters use in the most dangerous emergencies

From the 1960 plane crash in Park Slope to the 2001 terrorist attacks at the World Trade Center, Rescue Company 2's firefighters have constantly responded to New York City's most dangerous emergencies.

They work in Brooklyn and are trained to deal with about 3,800 emergency rescue situations a year.

Captain Liam Flaherty, who leads Rescue Company 2, told Business Insider about the life-saving tools and technologies that his team uses - from high-tech harnesses for scaling buildings to diamond-cut saws for breaking through concrete walls. Here are a few of them.