Watch: World Stands in Solidarity With UK After Parliament Attack

On the anniversary of Brussels bombings that killed 30 people, London faced a bloody Wednesday when an unknown assailant allegedly mowed down pedestrians with his car on the Westminster Bridge. He then went on to stab a police officer outside the House of Parliament, who later succumbed to his injuries.

The attacked was shot dead by police officers. Three others were killed, while 40 injured in the catastrophic incident.

The entire world stood up besides Britain in solidarity and condemned the attack in the harshest words.