Black smoke billows from the chimney of the Sistine Chapel, meaning Roman Catholic cardinals have not elected a pope in their second or third rounds of balloting, at the Vatican, Wednesday, March 13, 2013. Cardinals voted twice Wednesday in Michelangelo's famed frescoed chapel after a first vote Tuesday in a conclave to elect a successor to Benedict XVI, who stunned the Catholic world last month by becoming the first pope in 600 years to resign. (AP Photo/Gregorio Borgia)