Iran Threat: Attack on U.S.?

Intelligence officials see growing risk of Iranian spies and possible attack.
2:19 | 01/31/12

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Transcript for Iran Threat: Attack on U.S.?
A new warning tonight from America's top intelligence official about the -- the Director of National Intelligence. Says that Iran is changing its game plan stepping up and spying and more determined than ever to launch an attack on US soil. ABC's Martha Raddatz on the tensions raised even higher tonight. This Saber rattling coming from Iran has been constant warnings to US ships. Threats to close down vital oil transit lanes in the Strait of Hormuz. But today America's top intelligence chief had a new racing warning. Revealing that Iran may be more ready than ever to launch terror attacks inside the United States. I think they are. Consistent -- rituals were they're trying as well to penetrate. And engage in this in this hemisphere. James clapper Director of National Intelligence told the Senate Intelligence Committee today quote. Some Iranian officials probably including supreme leader Ali comedy. Are now more willing to conduct an attack in the United States. In response to real or perceived US actions that threatened the regime. He pointed specifically to last year's plot to assassinate the Saudi ambassador to the United States. And two reports that Iran has been supporting has -- sales in Latin America. Iran's president -- -- John. Recently traveled there meeting leaders like Cesar Chavez of Venezuela and Fidel Castro who have little love for the US. This comes as the US is increasing pressure on Iran to drop its nuclear program. -- Will Capel producing enough highly enriched uranium for weapon. If it's political leaders specifically the supreme leader himself choose to do so -- but clapper as the news was not all back him he says. Al-Qaeda is significantly weaker since the killing of Osama bin Laden and the American born -- -- lucky in Yemen. Clapper says al-Qaeda while still a threat is probably unable to launch a massive attack. Director clapper also noted the rising volatility in the wake of the Arab Spring. Which issue -- Diane we are seeing throughout the Middle East.

This transcript has been automatically generated and may not be 100% accurate.

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