US military training in US cities?!! For what danger?-----City says loud explosions were army training exercise

City says loud explosions were army training exercise - WNEM TV 5:
"FLINT, MI (WNEM) -
It was a peaceful afternoon, and then residents said it seemingly turned hostile.
"I was standing there, and all of a sudden, boom!" Jean Glenn said.
"I mean it was loud, it blew up the whole sky or whatever, it was like four or five big bangs," Annette Humphrey said.
Explosions you'd expect in a war zone echoed through Flint. People's homes shook and those inside were caught off-guard.
It all went down at the shuttered Lowell Junior High on the city's east side.
The blasts are just an Army exercise.
"There's older people, it probably gave them a heart attack or something," Glenn said.
Flint's spokesman Jason Lorenz said the city has been in talks with the army for months now about using parts of the city.
"It's an exercise to help their personnel do training with urban environments," Lorenz said.
That training includes using aircraft and simulated ammunition.
It will continue for the next 10 days..."