The Fort Myer Exchange is offering additional savings of 6% off select back to school items during Virginia's sales tax holiday weekend from August 1-3 to help military families with back to school shopping. An open house of the historic Grant Hall courtroom on Fort McNair, site of the 1865 military tribunal for those involved in Abraham Lincoln's assassination plot, will be held on August 2 from 10am to 4pm. Parking will be temporarily restricted on portions of Fort McNair from August 2 at 10pm through August 3 due to the open house. Major road closures are also planned outside of Fort McNair from August 4-7 for the 2014 U.S. Africa Leaders Summit in Washington D.C.