34th America's Cup, Louis Vuitton Cup Semi-Finals: Luna Rossa Vs Artemis Racing
The AC72 catamaran is the current model designed for and sailing in the 2013 America's Cup Finals. This 72-foot-long boat has a solid wing instead of a billowing sail. Having a fixed wing in place of a traditional mast and sail provides more speed, but is also more dangerous.
Larry Ellison, the last winner of the Cup, won with a wing-sail powered trimaran. By virtue of winning the Cup, and becoming the defender, he got to rewrite the race's rules. So for the 34th America's Cup he required competitors to race using the lightweight AC72s. Ellison's aim was to convert sailing into an extreme sport.