Marine Corps Commandant Gen. James Jones yesterday approved the start of a smallpox immunization program for all Marines headed to the U.S. Central Command region, which includes Iraq. In a message sent to all Marine commands, Jones said the service would implement the Defense Department's smallpox vaccination plan "as soon as possible [in order to] protect Marine Corps personnel and preserve combat effectiveness in the event of a smallpox attack." The threat of a smallpox attack cannot be quantified, Jones...