Let the National Guard drive up on each of the streets that cross into the zone and emplace MUMVEEs with machine guns on them, Then move in infantry with M-16s and make obvious preparations to move in. Announce over bullhorns and on TV that there will be one open street for exit, open for 4 hours. Then all units move into the zone ahead of the police who are empowered to arrest and hold anyone they meet.
Where’s Janet Reno when we need her?