Physical attacks on the U.S. power grid rose last year by 71%, compared to 2021 and surpassed 2020 figures by 20%. The industry's preeminent clearinghouse predicts the number of serious incidents will continue to rise this year. CBS News has obtained a confidential analysis of physical attacks on the U.S. power grid authored by the Electricity Information Sharing and Analysis Center (E-ISAC), which is a data center documenting threats against the electrical system and a division of the North American Electric Reliability Corporation (NERC). According to the analysis, E-ISAC "assesses with medium confidence that the recent uptick in serious physical...