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The president reiterated to reporters that his reason for stopping the strike was because he didn't want to kill 150 Iranians \"unless it's absolutely necessary.\"

The United States did respond with a cyber strike against the country, The Washington Post reported on Saturday and a source later confirmed to ABC News. Trump approved an offensive cyber strike against Iranian computer systems used to control rocket and missile launches. The cyber attack was launched Thursday and was in the works for weeks if not months.

\"PHOTO:
Michael Brochstein/SOPA Images/LightRocket via Getty Images, FILE
PHOTO: U.S. Representative Mac Thornberry speaks during the American Israel Public Affairs Committee Policy Conference in Washington, D.C., March, 03, 2019.
>

Thornberry told Raddatz on \"This Week\" that when Trump met with Democratic and Republican congressional leaders Thursday, himself included, \"everyone agreed that shooting down an unarmed American aircraft deserved a response,\" and that all agreed \"it should be on the lower end of the range of possibilities.\"

However, he added, \"This story is not over,\" saying the Iranian's response to the cyber strike matters.

\"Obviously the president has a whole range of additional responses that he could employ,\" Thornberry said. \"There are a number of other military and probably other actions that could be taken if the Iranians decide that they want to continue this aggressive provocative sort of behavior.\"

The top Republican on the Armed Services Committee credited the president for seeking bipartisan input on how the United States should respond, but Booker was critical of the fact that a military response was considered at all, saying on \"This Week\" that Trump can't take military action against Iran without congressional approval.

\"The Constitution speaks very clearly on this that he needs to come to Congress before he engages in military action that again could have us tumbling towards chaos and war in that region,\" he said.

\"This situation is getting more and more tense, not less. We have a president that seems to be doing this like a reality TV show when trying to build more drama and trying to make a foreign policy by tweet,\" Booker added. \"We have to, as a nation, work in coordination with our allies to denuclearize Iran, and to bring stability and peace back to that region.\"

Mullen said that if Iran does begin enriching uranium again and looks to be on its way to developing a nuclear weapon, it may lead to Israel attacking the country.

The former Joint Chiefs chairman also warned, \"Iran with a nuclear weapon would start to proliferate nuclear weapons in the Middle East, which is incredibly dangerous. Other countries would then probably generate that kind of capability. And the Middle East has got a lot of problems and we don't need more nukes.\"

\"PHOTO:
Pablo Martinez Monsivais/AP
PHOTO: Sen. Cory Booker testifies about reparation for the descendants of slaves during a hearing before the House Judiciary Subcommittee on the Constitution, Civil Rights and Civil Liberties, at the Capitol in Washington, June 19, 2019.
>

Booker echoed that warning, saying, \"We're closer to a nuclear weapon, which could trigger proliferation around the region. It could trigger a military conflict and have us tumbling back into a Middle East war that will cost American lives and trillions of American dollars.\"

Thornberry said on \"This Week\" that Trump is \"giving the Iranians every opportunity to back out of this cycle of increasing violence.\"

He said Trump shouldn't be criticized for giving the country the opportunity, but added that there's a limit to that.

\"If Iran goes back to mining tankers, the sorts of things they've been doing here lately, then we have a whole range of military and other responses which we can employ, and I think the president will look to do that,\" he said.

But Mullen cautioned that if Iran gets a nuclear weapon, \"attacking militarily is a very, very difficult task to actually make it happen.\"

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