Are permanent works of granite the best and only way to pay tribute to America's most significant people and events? Or might temporary public art installations prove to be powerful alternatives to national commemoration in Washington?  Join the National Capital Planning Commission, the Smithsonian American Art Museum, the British Council, and the Trust for the National Mall on December 8 as we explore creative ways in which the nation's narrative can be told. Participants include:    * Julian LaVerdiere      Designer, World Trade Center Tribute in Light    * Justine Simons      Director, London's Fourth Plinth in Trafalgar Square    * Krzysztof Wodiczko      Harvard professor and artist in temporary and interactive light installations    * Thomas Luebke (Moderator)      Secretary, U.S. Commission of Fine ArtsLearn how temporary art installations can help alleviate pressure on the National Mall, open the door to more artists and project sponsors, prompt greater exploration of new and dynamic designs and materials, and bring new people into the discussion about placemaking in the public realm.