The crew of the U.S. Coast Guard Cutter #PolarStar completed their mission to re-supply U.S. science operations in Antarctica, escorting the final re-supply ship safely from the ice-covered Ross Sea Tuesday (PST). The crew faced flooding and a constant nag of engineering problems on the 40-year-old heavy icebreaker, which at times slowed their progress and frustrated 150-person crew. At one point during their voyage, Cutter Polar Star began taking on water at a rate of 20 gallons per minute afte