How likely is Iran to carry out a retaliatory cyberattack on the U.S.?

The war in Iran is sparking cyber security concerns here in the US. In the past, Iran has launched several digital attacks in the US, including ransomware and data breaches. As of now, hackers linked to Iran have made threats on social media, but so far not any confirmed major cyber attacks.Joining us to talk more about this is NBC News reporter Kevin Collier. Uh Kevin, some Iranian hacker groups have promised, as we said on social media, they're saying, "We're going to retaliate." They said it on Telegram ...