Why did the US send a guided-missile submarine to Middle East?

It was announced late last night, the Pentagon said it was sending a guided-missile submarine to add to the US naval strength in the region as a warning to Iran. This is the USS Georgia, one of four Ohio class nuclear ballistic-missile submarines converted to carry long-range Tomahawk land-attack cruise missiles. There is no question it is a hugely potent platform for land-attack strikes. But what does the Pentagon have in mind? It's not a platform for shooting down enemy ballistic missiles. So is the warning to Iran suggsting that any attack on Israel will lead to an American Tomahawk attack on targets in Iran? Surely not! That would be seen as a huge escalation. It would also encourage Israel to respond miitarily if attacked by Iran. Then we are talking about a full-scale war which no one wants. So the deployment of the guided-missile submarine to the Middle East is a very potent but symbolic move by Washington. Far more relevant is the Pentagon's order to the captain of the aircraft carrier, USS Abraham Lincoln, to speed up and get to the Middle East region as fast as possible. The carrier laden with fighter jets had been ordered to move from the Asia Pacific to the Middle East some weeks ago. A carrier of course with its full display of aircraft including surveillance-gathering planes, would be very useful for taking on a flurry of Iranianh ballistic and cruise missiles if that is what happens. Nobody really knows what is going on in Tehran right now but they have waited 12 days so far before retaliating for the assassination of the Hamas political leader in the Iranian capital on July 31. Will the dispatching of the USS Georgia and the "hurry-up" order to USS Abraham Lincoln stir the Iranian regime to launch its promised attack on Israel soon or will it have the opposite effect?