Police use facial recognition technology at London's Notting Hill Carnival

The two-day street festival is a celebration of Caribbean culture and attracts around 2 million revellers. Around 7,000 police officers and staff are on duty at the carnival each day - and the use of live facial recognition technology is also being deployed. Picture credit: Yui Mok/PA Subscribe: http://smarturl.it/AssociatedPress Read more: https://apnews.com​ This video may be available for archive licensing via https://newsroom.ap.org/home