Iran attack response: Trump warns US will 'hit them hard'

President Donald Trump warns the U.S. will respond to an overnight attack on forces, saying 'we will hit them hard.' Meanwhile, markets decline and oil prices rise above $90 amid Iran tensions.

Breaking news unfolds as President Donald Trump warns that the United States will hit back hard following an attack on U.S. forces. Meanwhile, financial markets react to the escalating tensions in the Middle East with Dow futures falling over 190 points and Brent crude oil prices surging past $90 a barrel.