Cases like the shooting at Columbine High School in 1999 brought many changes to police tactics. Identify one of the changes from the options below.
◦ Responding officers immediately set up a perimeter and wait for S.W.A.T.
◦ Responding officers enter immediately to neutralize the shooter.
◦ Responding officers focus first on the injured victims.
◦ Responding officers set up a command center before any further action.