Obama's Commerce Choice, Armstrong May Talk Doping

Feb. 7 (Bloomberg) -- Bloomberg's Sara Eisen reports on today's "Top Headlines." She speaks on Bloomberg Television's "Bloomberg Surveillance."

Twitter Earnings Disappointment: What Went Wrong?
45:12 - Rina Hiranand, strategy director at Social@Ogilvy, discusses Twitter's earnings and what could help turn the company around. She speaks to Bloomberg's Angie Lau on "First Up." (Source: Bloomberg)
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