Egyptian President Hosni Mubarak set off an explosion Thursday, launching an ambitious and controversial plan to make the Western Desert bloom with water channeled from the Nile River. When the canal is done, if all goes according to plan, water will wind its way 190 miles (310 kilometers) across the Western Desert to irrigate 500,000 acres (200,000 hectares) of virgin land. And, if all goes according to plan, the newly irrigated land will be populated by hundreds of thousands of people. The explosion Thursday was the first step in the construction on a pumping station that Egypt claims will be...