The large and very advanced nature of the US Naval warships is not only directed at Iran. There is a great fear that Russia and China may oppose the naval and air/land blockade of Iran. If Russian and perhaps Chinese naval warships escort commercial tankers to Iran in violation of the blockade it could be the most dangerous at-sea confrontation since the Cuban Missile Crisis. The US and allied Navies, by front loading a Naval blockade force with very powerful guided missile warships and strike carriers is attempting to have a force so powerful that Russia and China will not be tempted to mess with. This is a most serious game of military brinkmanship with major nuclear armed powers that have profound objections to the neo-con grand strategy and to western control of all of the Middle East's oil supply.