By Sarah N. Lynch and Raphael Satter WASHINGTON (Reuters) -The U.S. unveiled criminal charges against four Russian government officials on Thursday, saying they engaged in two major hacking campaigns between 2012 and 2018 that targeted the global energy sector and impacted thousands of computers across 135 countries. In one now-unsealed indictment from June 2021, the Justice Department accused Evgeny Viktorovich Gladkikh, a 36-year-old Russian ministry of defense research institute employee, of conspiring with others between May and September 2017 to hack the systems of a foreign refinery and …