1:25newsDecember 18, 2020Russia is prime suspect in massive cyberattack on US governmentThe security breach, which hit federal agencies including the National Nuclear Security Agency, went undetected for six months, sources told ABC News.Up Next in newsABC News Live Prime: Thursday, December 17, 2020December 18, 2020Sandra Day O'Connor, 1st woman on Supreme Court, dies at 93December 1, 20231 year after Club Q tragedy, loved ones share treasured memories of lives lostNovember 19, 2023