The same submarine was hit by an explosion in 2010 that killed one sailor and injured two others. The navy said that accident was caused by a faulty battery valve that leaked hydrogen, causing an explosion in the vessel's battery compartment. There have been no details on what caused this week's blasts..Santa Runs A 5KA competitor raises his thumbs up as he takes part in the annual Santa Dash in Liverpool, northwest England on Dec. 4, 2011. The five kilometer race sees thousands of entrants run through the streets of the city center dressed as Santa Claus.

The death of Simpson, a twotime Olympic medallist from Great Britain and a father of two, led regatta director Iain Murray to implement 37 safety recommendations, including adding survival gear. The knives are in case sailors need to cut themselves free after a capsize. The selflowering devices are in case a boat rolls onto its side, stranding sailors high above the cold water..It's a long term plan but it will probably