In an interview with NBC news, Admiral Mike Mullen, Chairman of the Joint Chiefs of Staff said, "Military actions have been on the table and remain on the table. I hope we don't get to that but it's an important option."
He, however, stressed that there were concerns over the repercussions of such a step.
"Quite frankly, I am extremely concerned about both of those outcomes," he added.
Even though Pentagon has this plan, the power to take the final decision on the action against Iran rests with the President, Barack Obama, he informed and hoped that the combination of international diplomatic efforts and sanctions against Iran may prompt Tehran to suspend a nuclear enrichment programme.
"Certainly for our country the President would be the one making those decisions and I wouldn't be one that would pick one or the other along those lines. I think they both have great downside potential," he said.