President Trump appeared to suggest the U.S. will resume testing nuclear weapons for the first time in three decades, saying it would be on an "equal basis" with Russia and China.
The NYPD is deploying additional resources to religious, cultural and diplomatic sites across New York City.
The White House on Thursday stated definitively that Iran could produce a nuclear weapon in "a couple of weeks" once given the go-ahead from Ayatollah Ali Khamenei.
Known as the Joint Comprehensive Plan of Action, or JCPOA, the deal followed two years of negotiations during the Obama administration.
The world is waiting for President Donald Trump's decision on whether the U.S. will join Israel in military action to wipe out Tehran's nuclear facilities.
Israel launched an expanded assault on Iran on Sunday while Tehran unleashed a fresh barrage of missiles.