A fragile ceasefire between Iran and Israel appeared to hold Tuesday after initially faltering, and U.S. President Donald Trump expressed frustration with both sides, saying they had fought ''for so long and so hard'' that they do not know what they are doing.

The US president is due to arrive at the Nato summit shortly after earlier accusing Israel and Iran of violating the truce.

But when asked if Iran still poses a severe threat to U.S. troops and Americans around the world, Cooper said yes. "They do. They possess considerable tactical capability, one ele