Riders on the subway in New York City might have noticed a new addition to the transit system: a robot named K5. K5 is a crime-fighting machine that is supposed to make the subway safer and more secure. K5 looks like a giant cone with wheels. It has four ultra-HD (4K) cameras with complete 360-degree visibility, one thermal camera to detect differences in heat, LED lights, 16 microphones, and an amplified PA speaker/horn. It moves autonomously and avoids obstacles and people with a maximum speed of 3 miles per hour. However, an officer accompanies the robot as it moves. K5 is part of a pilot program by the NYPD to deploy artificial intelligence (AI) robots in the subway system. The NYPD is reportedly renting K5 for $9 an hour from a company called Knightscope, which claims that its robots can reduce crime. The NYPD says that K5 can act as a physical deterrent to crime, as well as on-the-ground eyes to record those who commit crimes for future prosecution.