Trump's decision came after Israel and Iran have exchanged consistent strikes since June 13. Israel had urged the U.S. to target Iran's nuclear facilities, saying that Tehran was moving close to creating a nuclear weapon. Iran maintains that its nuclear program is for civilian, not military, purposes.

"Iran was very close to having a nuclear weapon," Vance said in an interview on Fox News' "Special Report with Bret Baier." "Now Iran is incapable of building a nuclear weapon with the equipment they have because we destroyed it,

Ballistic experts say it's too soon to determine how much damage Iran's nuclear facilities sustained in the weekend attack. On Saturday night, the United States targeted nuclear sites in Iran believed to be essential to the country's ability to produce nuclear weapons: a uranium enrichment site located in northwestern Iran -- deep inside a mountain in Fordo -- along with another uranium enrichment site in Natanz and the Isfahan Nuclear Technology Center,

“Remember, Iran cannot have any nuclear weapons. Very simple. Don’t have to go too deep into it. They just can’t have nuclear weapons.” “Iran’s leaders should understand that I do not have a policy of containment; I have a policy to prevent Iran from obtaining a nuclear weapon.”