London Notting Hill Carnival to Have Knife Detection Arches for the First Time

Knife detection arches will be used at London's Notting Hill Carnival for the first time, police said. London's Metropolitan Police hope that the "tried and tested method" will deter people from attending the popular parade while carrying knives. Around a million visitors are expected to attend the event over the three-day weekend this year, which is described on its official website as Europe's largest street event. Police said about 13,000 police officers will be on duty during the two-day carnival, the highest number in six years. Almost 7,000 officers are expected to police the event on Monday, Aug. 27, a national holiday day in the UK.