Second man arrested in connection to London attack

Forensics officers investigate a property in relation to Friday's terror attack in London. The threat level in the United Kingdom was raised to "critical" after the attack, but it was lowered to "severe" on Sunday.
Forensics officers investigate a property in relation to Friday's terror attack in London. The threat level in the United Kingdom was raised to "critical" after the attack, but it was lowered to "severe" on Sunday.