The drills, at MetLife Stadium in northern New Jersey, simulate a 10,000-ton improvised nuclear device going off, with authorities practicing how to evacuate and treat victims of a potential nuclear attack in the New York City area.
New York, New Jersey and Connecticut emergency management teams are also participating.
Similar-type drills are taking place in Albany and Washington, D.C.
The multi-day drills at MetLife Stadium, which began on Monday, are not in response to any current events, including possible threats from North Korea, federal authorities said.
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