Dramatic Tornadoes Strike U.S. Midwest

May 20 (Bloomberg) -- In "The Big Picture," Bloomberg's Susan Li reports on the top stories of the day. She speaks on Bloomberg Television's "First Up." (Source: Bloomberg)
PetroChina Misses Full Year Estimates, Trumps Peers
20:50 - China’s largest oil and gas producer missed expectations for its full year earnings. Bloomberg’s Christine Hah reports on “First Up.” (Source: Bloomberg)
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