The United States is ramping up efforts to protect Americans worldwide, as President Donald Trump mulls wading into Israel’s conflict with Iran. The actions come as Iran’s Islamist leader warned of “irreparable damage” if Washington joins the escalating volley of airstrikes aimed at destroying Iran’s nuclear ambitions.

Iranian Deputy Foreign Minister Majid Takht-Ravanchi tells Christiane Amanpour “our hands will not be tied,” if the US joins Israel’s strikes against Iran’s nuclear program.