Attacks on NYPD officers are "assassination attempts," commissioner says

The NYPD called two unprovoked attacks on officers by the same alleged gunman "assassination attempts." Surveillance video shows the suspect, Robert Williams, apparently walking into a police station and officers running for cover after gunshots ring out. This unfolded less than 12 hours after Williams allegedly shot an officer inside a police van. David Begnaud reports from the 41st Precinct in the Bronx.