'Battle lines between protesters and the police are already being drawn for the NATO and G-8 summits that Chicago will host next spring. On Thursday, an anti-war organizer said he was scouting potential staging areas for crowds of protesters expected outside the summits in May.

Meanwhile, police Supt. Garry McCarthy said he’s been planning for three weeks. And he put a deputy superintendent, Debra Kirby, in charge of preparing the Chicago Police Department’s response.

“We have to train for mass arrests,” McCarthy said. “We have to train 13,000 police officers in arrest procedures and containment procedures. At the same time, we will not stop patrolling the city.”'

Read more: NATO Summit: Chicago Trains 13,000 Police For Mass Arrests