President Donald Trump says the strikes he ordered against Iran's nuclear program "had to be done," and he praised the B-2 bomber pilots who carried out the attacks as "heroes."

Trump made the comments to Fox News' Steve Doocy, who spoke to the president on Sunday. Doocy visited the air base in Missouri where the B-2 pilots landed after their mission, which lasted a total of 37 hours.

Doocy said the pilots take shifts flying the plane on extended missions like Operation Midnight Hammer, saying there is a small space behind the ejection seats where pilots can rest. Pilots are also known to bring small coolers for snacks, and there is even a small microwave oven aboard the plane, Doocy said.

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After U.S. airstrikes on high-value nuclear sites in Iran, Americans could be vulnerable to targeted cyberattacks and terrorist acts from lone wolves, according to one expert. 

Bill Daly is a former FBI investigator who worked to thwart terror attacks and dealt with foreign counterintelligence. He told Fox News Digital that while hard infrastructure like rail lines and power plants could be at risk, cybersecurity should be a key focus. 

"You also look at things such as power plants, utilities, that type of infrastructure, where if they were able to put a concentrated effort towards a cyberattack, you could diminish the electrical grids, and other kinds of technical infrastructure," Daly said. "We know they've looked at ways to try to get into our infrastructure, or controlling water resources or water systems or [the] electrical grid."

He said that if Iranian state-sponsored terrorists are looking to attack, rather than just lone wolf terrorists, there is a higher risk of a sophisticated cyberattack. 

"I think maybe something to do with the power grid might be something that they could do – try to do – remotely, without sending somebody here," he said. 

Daly said that potential cyberattackers could "overwhelm the internet infrastructure" and turn off systems that are critical to Americans' everyday lives. 

However, Daly is also worried that with the open border policies of the Biden administration, there is no telling how many bad actors are already in the United States. 

This is an excerpt from an article by Fox News' Peter D'abrosca

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The U.S. Embassy in Qatar called on all Americans in the country to shelter in place "out of an abundance of caution" on Monday.

The embassy did not explicitly say the recommendation was in reaction to tensions with Iran, but it follows a number of similar heightened security announcements throughout the region.

"Out of an abundance of caution we recommend American citizens shelter in place until further notice," the embassy wrote on its website.

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Russia condemned the U.S. strikes on Iran's nuclear program on Monday, suggesting that President Donald Trump's intervention threatens to plunge the region into the "abyss."

Kremlin spokesman Dmitry Peskov made the comments to reporters on Wednesday, saying Russia regrets the strike on Iran and offering assistance. Russian ambassador to the U.N. Vassily Nebenzia similarly claimed that the U.S. has opened "Pandora's box."

Russian President Vladimir Putin is scheduled to meet with Iranian Foreign Minister Abbas Araqchi later Monday.

Reuters contributed to this report

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Israel struck airfields and key military infrastructure across Iran on Monday in a surge of attacks that followed the U.S. targeting three Iranian nuclear facilities this weekend.

Israeli Defense Minister Israel Katz said the IDF is targeting "state oppression apparatuses in the heart of Tehran," including the Basij headquarters, Evin Prison for political prisoners and regime opponents, the “Destruction of Israel” clock in Palestine Square, internal security headquarters of the Revolutionary Guards, the ideology command center and other targets.

"For every attack on the Israeli home front, the Iranian dictator will be punished, and the strikes will continue with full force," Katz said.

"We will continue to act to defend the home front and defeat the enemy until all war objectives are achieved," he added.

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Despite a recent barrage of Iranian missiles targeting northern Israel, there were no immediate reports of injuries or impacts, prompting authorities to announce that civilians could leave bomb shelters.

Meanwhile, the IDF reportedly stepped up attacks on critical targets in Iran, according to the Times of Israel.

Defense Minister Israel Katz stated that the IDF is “currently striking with unprecedented force regime targets and governmental repression bodies in the heart of Tehran.”

“Images will soon be released, illustrating the depth of the damage,” he said in a statement.

“For every [missile] fired at the Israeli home front, the Iranian dictator will be severely punished, and the strikes will continue with full intensity. We will continue to act to defend the home front and defeat the enemy until all war objectives are achieved."