Israeli President Isaac Herzog thanked President Donald Trump for ordering American airstrikes on Iran's nuclear program, framing the attack as "a moment in which the principles of freedom, responsibility and security prevailed."

"This critical action serves the security interests of the entire free world," Herzog said in a post to X. "I hope it will lead to a better future in the Middle East -- and will also assist in the urgent release of our hostages from captivity in Gaza."

Israeli airspace is closed for both inbound and outbound flights, according to the Israel Airports Authority.

Land border crossings to Sinai and Jordan are operating as usual, the IAA said.

-ABC News' Will Gretsky

A Washington Post poll conducted earlier this week, ahead of the U.S. strikes, found that more Americans opposed than supported potential airstrikes against Iran.

The poll, conducted on Wednesday, asked, "At this time, would you support or oppose the U.S. military launching airstrikes against Iran over its nuclear program?"

The poll found that 45% oppose, 25% support and 30% are unsure.

B-2 bombers dropped a number of Massive Ordnance Penetrator bombs -- known as the bunker buster -- during the U.S. mission over Iran, a U.S. official confirmed.

A number of Tomahawk cruise missiles were also fired at targets inside Iran from a U.S. Navy submarine, the official confirmed.

-ABC News' Luis Martinez