BARBARA STARR, CNN PENTAGON CORRESPONDENT: Late last week against a group called Kata'ib Hezbollah. This is one of Iran's proxy groups, they have a large number of fighters in Iran also in Iraq and Syria. And what they went after was their networked communications. This was a cyberattack to try and keep this proxy group from being able to communicate among itself and with its leadership back in Iran at this very sensitive, tense time. Now, we don't know yet how well the cyberattack worked. We don't know how much of their communications have been brought down. Cyber always very appealing because you keep U.S. troops safe. You're not in a situation where you're bombing. But it's an intelligence risk because sometimes you want to keep the adversaries' communications going so you can eavesdrop, so you can listen in, so you can figure out what they're up to. But this time, they wanted to give the president these options and he did approve them. This may be one of the most significant efforts in cyberattacks in this time frame when tensions have been rising so rapidly. The president today, again, talking about obliteration in a kinetic sense, if you will, strikes, military strikes against Iran if they were to attack Americans. It's raising a lot of tensions in the region. Right now, the Pentagon still hoping very clearly that Iran does not respond in some military fashion to the latest sanctions and they don't have to go back to where they were last week which was considering air strikes. John?</s>JOHN KING, CNN ANCHOR: Barbara Starr, important details from the Pentagon. Barbara, appreciate that. When we come back, tomorrow night, Elizabeth Warren will be on a debate stage. Today, she released a plan she says would make American elections more secure.
U.S. Targeted Key Iranian Proxy Group in Cyberattack