Police attend scene of Manhattan attack. Video, 00:00:58Police attend scene of Manhattan attack
Attacker was 'screaming in the street' Video, 00:00:48Attacker was 'screaming in the street'
NYC mayor: 'We will be undeterred' Video, 00:01:17NYC mayor: 'We will be undeterred'
Footage shows New York attack suspect. Video, 00:00:34Footage shows New York attack suspect
