"Was it going to be primarily a historical document, a monument to the dead or a theme-park-style tourist attraction? How many historical museums are built around an active repository of human remains, still being added to? How many cemeteries have a $24 entrance fee and sell souvenir T-shirts? How many theme parks bring you, repeatedly, to tears?" The September 11 Memorial Museum opens next Wednesday, but the Times has Snowfalled it today.