Major US cruises are diverting their ships away from popular Mexican ports due to widespread violence after the death of the country’s top cartel boss . Norwegian Cruise Line said its 4,000-passenger ship, the Norwegian Bliss, would skip the resort community of Puerto Vallarta on Wednesday. The move comes after Carnival Corp opted to have its Royal Princess cruise also skip Puerto Vallarta, where many American tourists are currently taking shelter. The Royal Princess, which can carry more than