The murders were mostly carried out in stabbing attacks with knives.

Now, London Mayor Sadiq Khan is taking action — by implementing knife control.

What is Khan doing?

In response to the spike in crime, Khan deployed over 300 additional London police officers to the city's most crime-ridden neighborhoods to stop and search anyone they suspect is carrying a knife. In the U.S., such policies are very controversial and possibly violate the Fourth Amendment, but in England, police are able to stop and search anyone they suspect is carrying a knife.