A leading archeologist tweeted instructions on how to safely topple an obelisk as George Floyd protestors in her town toppled a Confederate statue during a demonstration that escalated into unrest. University of Alabama at Birmingham archeologist Sarah Parcak took to Twitter Sunday evening offering details on how to bring an obelisk down as demonstrators in the city's Linn Park defaced a Confederate monument and tore down a statue of Confederate Naval captain Charles Linn Sunday night. A day earlier, protestors in Nashville, Tennessee, toppled a statue of Edward Carmac, a former politician and newspaper publisher who wrote editorials expressing racist...