Hector, a black Labrador is one of the "security officers" in the United Nations K-9 (Canine) Unit. Here he is pictured with Officer Roren Aitcheson on patrol at the organization’s headquarters in New York. /Xinhua Photo

The UN building is guarded by a group of Labradors and their handlers. /Xinhua Photo

There are 10 security officers and each has their own canine companion, patrolling daily to ensure the safety of the UN building. /Xinhua Photo

All of the dogs on duty are Labradors because of their friendly demeanor. They were all trained for at least three months by New York state police. /Xinhua Photo

Part of their job is to check anything in the area of the UN building, such as vehicles, rooms and packages. They are among the busiest security personnel in the country with each unit carrying out around 30,000 searches per year. /Xinhua Photo