A Cuban cargo ship was sliced in half by a Miami-based cruise liner Friday, leaving three of its 45-member crew missing and one man severely injured, the Coast Guard said. No one was hurt aboard the Celebration cruise ship, which remained in the area 20 miles off the eastern tip of Cuba searching for more survivors, said a Coast Guard spokesman. Forty-two people aboard the Cuban ship Capitan San Luis were rescued after the 6 a.m. collision. Searchers, including Coast Guard ships and planes, were continuing to look for the other three.