(FILES) This file photo taken on January 10, 2017 shows former White House national security advisor Michael Flynn during a conference on the transition of the US Presidency from Barack Obama to Donald Trump at the US Institute Of Peace in Washington DC. Investigators are probing whether former White House national security advisor Michael Flynn discussed expelling a Turkish dissident back to his country in exchange for millions of dollars, US media reported on November 10, 2017. Special prosecutor Robert Mueller is examining a meeting Flynn had with senior Turkish officials weeks after Donald Trump won the presidential race last year, NBC News and the Wall Street Journal reported. / AFP PHOTO / CHRIS KLEPONIS