Mark Celin­scak is the Louis and Frances Blumkin Pro­fes­sor of Holo­caust and Geno­cide Stud­ies and the exec­u­tive direc­tor of the Sam and Frances Fried Holo­caust and Geno­cide Acad­e­my at the Uni­ver­si­ty of Nebras­ka at Oma­ha. He is the author of King­dom of Night: Wit­ness­es to the Holo­caust and Dis­tance from the Belsen Heap: Allied Forces and the Lib­er­a­tion of a Nazi Con­cen­tra­tion Camp.