Nuclear weapons agency updates Congress on hacking attempt POLITICO 12/23/2020 © Getty Images 20200712_Hacker_Getty_773 The Department of Energy and the National Nuclear Security Administration, which maintains the U.S. nuclear weapons stockpile, told congressional staffers in several briefings this week that there is currently no known impact to its classified systems from a massive hack that targeted its networks, according to an official with direct knowledge of the briefings. The officials told staffers, however, that the incident has proven how difficult it is to monitor the Energy...