7/28: Millions at pope's final Mass in Brazil; Pastor Warren's message after his son's suicide

      |3 million people packed Copacabana Beach in Rio as part of World Youth Day for Pope Francis. The pontiff encouraged young Catholics to spread the faith; and, Pastor Rick Warren, whose son committed suicide at the age of 27 following a life-long battle with depression, has returned to his congregation with a message about the stigma of mental illness.

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