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Vatican spokesman Father Lombardi talks to reporters during a news conference at the Vatican

Vatican spokesman Father Federico Lombardi talks to reporters during a news conference at the Vatican February 11, 2013. Pope Benedict has no specific illness and his decision to resign was taken with no outside pressure, the Vatican spokesman said on Monday after the pontiff's shock announcement that he would step down at the end of this month. REUTERS/Alessandro Bianchi (VATICAN - Tags: RELIGION) - RTR3DMUU

World reacts to Pope's resignation

Pope Benedict left the Catholic world in shock after becoming the first pontiff since the Middle Ages to resign his office, saying that failing strength had left him unable to lead the church through a period of relentless change and turmoil.