Iran's tyranny grips two escaped refugees: one who saves lives and one a cold-blooded killer, with the destiny of both in one woman's hands.Dr. David Badalian, a Christian anesthesiologist left Iran owing them for military service, so looking over his shoulder isn't new. His lifelong focus is America. Elated, he flies from Frankfort, Germany to Chicago where Rush Presbyterian Hospital has invited him to train. Dr. Ava Sevani,...