FILE - In this Nov. 14, 1991, file photo, then-Assistant Attorney General Robert Mueller points to a photo of the reconstructed wreckage of Pan Am Flight 103, which exploded over Lockerbie Scotland in 1988, killing 270 people. Mueller once again finds himself catapulted into the midst of historic events: The Justice Department has named him special counsel to investigate potential coordination between Russia and the Donald Trump team during the 2016 presidential election and related matters. (AP Photo/Barry Thumma, File)