On Sunday, May 7, the Odenton Heritage Society will open a special display, "Famous Farewells: VIP Funeral Trains through Odenton."  Funeral trains for American dignitaries were not new in the 20th century, but the Pennsylvania Railroad (today's Amtrak and MARC Penn Line) made this form of remembrance an institution.  Along the tracks, ordinary citizens paid their respects to Presidents William McKinley, Warren Harding, and Franklin D. Roosevelt, General Douglas MacArthur, and Senator Robert F. Kennedy as the trains rolled by.  The openness, public access, and outpouring of grief made the...