In his new book of investigative reporting, Lights Out: A Cyberattack, A Nation Unprepared, Surviving the Aftermath, Ted Koppel reveals that a major cyber-attack on America’s power grid is not only possible but likely, that it would be devastating, and that the United States is shockingly unprepared.

Ted Koppel is a 42-year veteran of ABC News and was anchor and managing editor of Nightline from 1980 to 2005.