More urban military training ops

This time, Chicago gets the low flying helicopters 'n such. 

According to the Chicago Trib,

U.S. military personnel are conducting training exercises in and around Chicago through Thursday, including flying military helicopters in areas around downtown at night. 

City agencies are providing support for the “routine military training exercises,” according to a release from the city’s Office of Emergency Management and Communications.

Earlier this year, similar highly visible exercises took place in Miami, followed by a mock assault on parts of Galveston, Texas.

I'd love to hear exercise planners explain what potential target cities comparable to Miami or Chicago the U.S. military wants to be ready to sweep into.