University of Maine historian Karen Sieber will be featured in a CBS special about the 1921 massacre in Tulsa, Oklahoma airing at 10 p.m. May 31.  The one-hour special, “Tulsa 1921: An American Tragedy,” marks the 100th anniversary of the two-day massacre, during which white Tulsans attacked, killed, destroyed and pillaged their Black neighbors and read more Sieber featured in upcoming CBS special about Tulsa Massacre