More than 8,000 cameras on the streets of NYC are used by police to find suspects

When it came time to identify a suspect in Saturday night's explosion in the Chelsea neighborhood of Manhattan, investigators turned to several of the 8,000 cameras that constantly record what's happening across New York City. After the Sept. 11 attacks, surveillance cameras were added in lower Manhattan, inspired by the "Ring of Steel" in London's financial district, developed in the 1990s, NBC News reports. Over time, the security initiative has grown to include more than 8,000 cameras across ...