Is it time to strike Iran?

How do you feel about pre-emptive strikes? The mullahs in charge of Iran are intent on making their nation a nuclear power in the region. They have just announced deployment of new highly accurate cruise missiles. That they are developing atomic weapons is beyond doubt. Do we sit on our hands as they develop nuclear-tipped cruise missiles? Or do we put an end to the regime while we have still have troops sitting on their borders in Iraq and Afghanistan? Taking Saddam Hussein's regime down was justified on the basis of global security. Could invading Iran be likewise justified? Do you believe meaningful economic sanctions can be effective when both Russian and China don't participate? Or would you never be in agreement with pre-emptive action?