The federal government issued a warning Thursday about potential cyber threats to water systems after 30 water plants in Minnesota were hit with cyberattacks th

The federal government issued a warning Thursday about potential cyber threats to water systems after 30 water plants in Minnesota were hit with cyberattacks that multiple U.S. officials tell ABC News may have been linked to Iran. ABC News' Pierre Thomas reports. [▻](https://video.twimg.com/ext_tw…