Sister Marie Simone-Pierre's, left, and sister Tobiana after deposing the glass reliquary containing the blood of late Pope John Paul II, during the beatification ceremony in St. Peter's Square at the Vatican, Sunday, May 1, 2011. The Vatican has decreed that Sister Marie Simone-Pierre's inexplicable healing was the miracle needed to beatify John Paul, a process that will reach its culmination Sunday during a Mass in St. Peter's Square celebrated by Pope Benedict XVI.