US gymnastics star Simone Biles wowed on the vault to seize her third gold of the Paris Games and seventh of her Olympic career on Saturday. She scored 15.300 from an average of two jumps, leaving Tokyo vault champion Rebeca Andrade of Brazil in second on a strong 14.966.American Jade Carey took bronze. Biles’ opening back flip with two and a half somersaults in the pike position is rarely ever tried by women gymnasts and the difficulty level alone gave her a huge advantage. The 27-year-old added vault gold to successes in the all-around and team competition at the Bercy Arena in Paris as she …