Washington (CNN) Fridays at the DC federal courthouse are typically days of high alert for the press corps trying to discern what special counsel Robert Mueller's next legal action will be. An entire floor of the courthouse was closed to the public and press for more than an hour. During that time, attorneys secretly entered the courthouse to argue before three federal appellate judges over a grand jury subpoena. Circuit, the E. Barrett Prettyman building - United States Courthouse, April 26, 2013, in Washington D.C. Clearly, a challenge related to Mueller's grand jury investigation was underway.

Source: CNN December 14, 2018 18:56 UTC