The New York Police Department has launched a new drone program, its first since it ended an unmanned aerial vehicle pilot program in 2011. The department says it will use its collection of drones -- 14 in all -- for search and rescue missions, crime scene documentation, hazmat incidents, large events like concerts and hostage situations. "As the largest municipal police department in the United States, the NYPD must always be willing to leverage the benefits of new and always-improving technology," Police Commissioner James O'Neill said in a statement. "Our new [Unmanned Aircraft System] program is part of this evolution -- it enables our highly-trained cops to be even more responsive to the people we serve, and to carry out the NYPD's critical work in ways that are more effective, efficient and safe for everyone." The NYPD currently has three types of drones.