Earlier this week, Carnival Cruise Lines President and Chief Executive Gerry Cahill said the company had launched a comprehensive review of its entire fleet.
It comes after a fire crippled the Carnival Triumph in the Gulf of Mexico last month.
More top news
The Australian government said Russia's participation in the Rio 2016 Games risks damaging the reputation of the Olympic movement.
PM Malcolm Turnbull said people convicted of terrorism-related charges would be held indefinitely if they pose an ongoing threat to society.
Democratic National Committee chair Debbie Wasserman Schultz stands down after leaked emails show party actively favoured Hillary Clinton.