The US has been moving many of our ships into the Gulf and for various reasons for sometime now...we basically have Iran surrounded.....plus Syria defused, or lets say otherwise occupied, claiming now they have an interim gov. organized and ready should Assad be removed in the near future.
Iraq is relatively stable, and Afghanistan is about as stable as it's going to be. Obama moving troops out might have also been relocating them to strategic places as well.
So the stage is fairly set for the best advantage I think. With this Netanyahu has stated, without reservations, that Iran will not be allowed to have the nuclear bomb and has not once moved from that position. So this move was a good move in light of the overall situations in the ME.