that's who clara luper is. >>> american history tv will be at the soldier's national cemetery at gettysburg national military park in pennsylvania, this coming tuesday, to cover the commemorative ceremony marking the 150th anniversary of abraham lincoln's gettysburg address. speakers include civil war his t orrian and author james mcpherson and sally jewel. watch the ceremony thanksgiving day, thursday, november 28th at 4:00 and 10:00 p.m. eastern time here on american history tv on c-span3. >>> all weekend long american history tv is featuring ann arbor, michigan, nicknamed tree town because of its dense forestation in parks and residential areas, hosted by our comcast cable partners, c-span's local content vehicles recently traveled will to explore the area's rich history. learn more about ann arbor, michigan, all weekend here on american history tv. >> it's ironic that this very important building and this very important foray into the sciences is an estate where cloud cover will wreck the conditions for viewing four out of five nights. but this is the -- if you wanted to run with the bi