National Public Radio: The company that owns the sunken Deepwater Horizon rig said Thursday that it planned to petition a federal court in Houston to cap its overall liability from the incident at less than $27 million. A spokesman for the Swiss company said the company will cite an 1851 law that says the owner of a sunken vessel is liable only for its value after the accident. Transocean has been named in more than 100 class-action, personal injury and wrongful death lawsuits, but a liability limit would …