Carnival Cruise Line says it will begin to phase-in cruises again starting Aug. 1 with eight of its ships leaving from Port Canaveral, Miami and Galveston.Carnival said that all North American cruises from June 27 to July 31 will be canceled, but beginning Aug. 1, the Carnival Breeze and Carnival Elation will sail out of Port Canaveral. Carnival said that other than the ships sailing