WASHINGTON (Reuters) - When members of Special Counsel Robert Mueller's team investigating Russia's role in the 2016 U.S. election have arrived for work each day, they have placed their mobile phones in a locker outside of their office suite before entering.
Operating in secrecy in a nondescript glass-and-concrete office, the team of prosecutors and investigators since May 2017 has unearthed secrets that have led to bombshell charges against several of President Donald Trump's aides, including his former national security adviser, campaign chairman and personal lawyer, who have pleaded guilty or been convicted by a jury.