Riots should be stopped as soon as they start

What can be done to prepare local police and other law officials to handle attacks by groups like ISIS?  That is a question bothering all of us as terrorists get stronger and stronger.  We don't know how to handle domestic riots, as demonstrated by the lawlessness in Baltimore.

We have seen how Baltimore did everything wrong, allowing the rioters and looters to do their worst without fear of arrest.  All riots should be met at the beginning with overwhelming force  and with arrests at the start of the  riots.