Ackman: `No Viable Alternative' to Fannie, Freddie

May 5 (Bloomberg) -- Bill Ackman, who runs the $15 billion Pershing Square Capital Management LP, talks about his investment in Fannie Mae and Freddie Mac. Ackman, speaking with Stephanie Ruhle on the sidelines of the 19th annual Sohn Investment Conference in New York, also comments on Valeant Pharmaceuticals International Inc.'s offer to buy Allergan Inc. and shareholder activism. (Source: Bloomberg)

World Leaders to Negotiate Climate Change Agreement
40:13 - 140 world leaders gather in Paris today for the start of the U.N. summit on climate change. The aim is to agree on cuts to greenhouse gas emissions. But after a recent wave of terror attacks, geopolitics may take center stage. Bloomberg's Caroline Hyde reports on "Countdown." (Source: Bloomberg)
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