 A shark seemed swimming close to shore and a woman bitten by a shark pulled to safety by good Samaritans who apply a tourniquet. One of four incidents on South Pottery Island where beach goers were attacked by sharks on one of the nation's busiest beach days, the 4th of July. Video from a Texas Department of Safety helicopter shows a shark close to the South Pottery Island shore. It's not known if it was the shark that attacked.