(FILES): This December 21, 2016 file photo shows US President-elect Donald Trump (L) with with Trump National Security Adviser designate Lt. General Michael Flynn (R) at Mar-a-Lago in Palm Beach, Florida. Michael Flynn, Donald Trump's former national security advisor, has been charged with lying to investigators over his Russian contacts, becoming the seniormost official indicted in the probe into possible collusion between the Trump campaign and Moscow. Flynn was charged November 30, 2017 with one count of lying about his private discussions with Sergey Kislyak, the Russian ambassador, regarding US sanctions being imposed on Moscow by the government of then president Barack Obama, a court document showed. / AFP PHOTO / JIM WATSON / XGTY