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ROME, ITALY - APRIL 06:  Pope Benedict XVI waves to the faithful gathered at the Colosseum during the Way Of The Cross procession on Good Friday April 6, 2012 in Rome, Italy. The traditional Catholic procession on Good Friday recalls the crucifixion of Jesus Christ ahead of Sunday's Easter holiday. (Photo by Franco Origlia/Getty Images)
ROME, ITALY - APRIL 06:  Pope Benedict XVI waves to the faithful gathered at the Colosseum during the Way Of The Cross procession on Good Friday April 6, 2012 in Rome, Italy. The traditional Catholic procession on Good Friday recalls the crucifixion of Jesus Christ ahead of Sunday's Easter holiday. (Photo by Franco Origlia/Getty Images)

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First pope in 600 years to resign

Papal historian Michael Walsh talks to CNN about why the pope decided to resign and what comes next.

First pope in 600 years to resign

Papal historian Michael Walsh talks to CNN about why the pope decided to resign and what comes next.