On this day in 1991, a single U.S. senator walked into the heart of a collapsing African dictatorship — and quietly set in motion one of the most breathtaking Jewish rescues since the Exodus.While the world watched Ethiopia’s brutal civil war and the worst famine in its history devour lives by the hundreds of thousands, Israel was already executing a shadow war of its own. In the early 1980s, Mossad agents had turned an abandoned Sudanese beach resort — the Arous Holiday Village on the Red Sea —