The fragile ceasefire between Israel and Iran appeared to be holding after a rocky start, giving rise to cautious hope that it could lead to a long-term peace agreement.

"We have two countries that have been fighting for so long, they don't know what the f-ck they're doing," Trump said.

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