Some 2,000 police officers, firefighters and EMTs will converge on several locations in the area this weekend for simulated "public safety incidents" that could include sirens and the sound of gunfire, the mayor's office reports.
Among the incidents, between 9 a.m. Saturday and 9 a.m. Sunday: An "active shooter" in Brookline; a rescue of "hostage" elected officials in Boston; a bomb on the T, an injured officer in Cambridge, a parking-lot collapse in Boston and a massive event at the South Boston convention center.
The goal of the "Urban Shield" exercise is to see how large numbers of first responders deal with several multiple incidents at once.
Urban Shield: Boston will run for a 24-hour period. As a result residents may observe public safety personnel responding to simulated emergencies. Each scenario will be run multiple times, and residents should not to be alarmed. There is no danger to anyone in the area, and exercises will be done in cordoned-off areas away from the public.