President Trump expressed optimism Monday that the war between Iran and Israel was coming to an end, just hours after Iran launched largely symbolic strikes on a U.S. military base in Qatar that were intercepted.

Experts say the U.S. should remain on alert for Iranian threats, even as a fragile ceasefire takes shape. Iran’s leaders have touted “a variety of options” for getting back at the U.S. for bombing three of its nuclear enrichment facilities on Saturday — and some of them would be much harder to trace than missiles.

“We've got 46,000 troops overseas. We've got three carrier battle groups going to be out there. There's lots of asymmetric things that the Iranians can do,” retired Army Brig. Gen. Steve Anderson, who served in Iraq during the 2007 troop surge, said Monday on CNN.

“They can do cyber warfare against us, they can exercise terrorist attacks. We talked about sleeper cells coming alive here in the United States and, oh, by the way, they can take economic action and just close the Strait of Hormuz,” he added. “So there's a lot that the Iranians can still do.”

Here’s how Iran could take revenge on the U.S.:

Cyberattacks

Iran, though hamstrung in its military might thanks to a more than two week Israeli air campaign against Tehran, still possesses a sophisticated offensive cyber capability.

Cliff Steinhauer, director of information security and engagement at the National Cybersecurity Alliance, sees denial-of-service attacks as the most........

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