KNOW IT ALL: Wednesday's Top Stories at NBC News

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Good morning. Here are the top headlines at NBC News:

Pope Francis: 'I'm a True Catholic'

Pope Francis told reporters that his teachings on social issues are in lockstep with Roman Catholic doctrine, while acknowledging that he's seen by some as a leftist. Read more in NEWS. And find full coverage of the pope's visit here.

Saint or Sinner? Controversial Canonization Opens Pope's Trip

He will be extolled as a self-sacrificing evangelist, but to some Native Americans, Junipero Serra's achievements are nothing to celebrate. Read more in NEWS.

RIP, Yogi Berra

The Yankees icon was 90. He became infamous for his “Yogisms,” but baseball fans knew him first as superstar player, one of only four men ever win the MVP award three times. Read more in NEWS.

Secret Document: NSA Spied on Iran's U.N. Delegation

A top-secret report, obtained by NBC News, shows the U.S. bugged the hotel rooms and phones of then-Iranian President Mahmoud Ahmadinejad and his entire 143-member delegation in 2007. Read more in NEWS.

Donald Trump Swears Off 'Birther' Talk

Republican presidential candidate Donald Trump told "Late Show" host Stephen Colbert on Tuesday that he was through talking about the birthplace of President Barack Obama. Read more in POLITICS.

Pharma Company Boss Backtracks on Spiking Drug Price

The pharmaceutical company boss under fire for increasing the price of the drug Daraprim by more than 5,000 percent said Tuesday he will lower the cost of the life-saving medication without detailing what the new price would be. Read more in NEWS.

Sean Penn Sues 'Empire' Co-Creator for Defamation

Actor Sean Penn has filed a $10 million defamation lawsuit against "Empire" co-creator Lee Daniels for implying the Oscar-winning actor abuses women. Read more in NEWS.