Could a war with Iran turn into a wider regional conflict?

The US has significantly ratcheted up its military presence in the Middle East in recent weeks. It has sent two aircraft carriers, as well as ships, jets and other assets, as a show of force toward the Iranian government. The two sides are set to meet for nuclear talks tomorrow, but as the escalations continue, The World's Shirin Jaafari looks at what Iran could do to retaliate.