(Cardinal Daniel Nicholas DiNardo, Archbishop of Galveston-Houston, left, and Cardinal Sean Patrick O'Malley, Archbishop of Boston, attend a press conference at the Pontifical North American College in Rome, Tuesday, March 5, 2013. The Sistine Chapel closed to visitors on Tuesday and construction work got under way to prepare it for the conclave, but five cardinals remained AWOL from the preparatory meetings to discuss who should run the Catholic Church following Benedict XVI's resignation.The Vatican ins)
