U.S. President Donald Trump addressed the executive order banning entry of citizens from 12 countries, including Iran, Yemen and Afghanistan, and said in a video posted on his Truth Social network that "the terrorist attack in Boulder, Colorado, highlighted the extreme dangers facing our nation from improperly vetted foreign nationals entering our country and those who come here temporarily and overstay their visas. We don't want them. We will not allow people who want to harm us to enter our country, and nothing will stop us from keeping America safe."