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Billionaire activist investor Bill Ackman calls on Trump to 'shut down' the U.S. for the next 30 days

Billionaire activist investor Bill Ackman, the CEO of $11 billion Pershing Square Capital, called on President Trump to shut the U.S. down for the next month to save lives as the coronavirus (COVID-19) spreads. Yahoo Finance's Seana Smith and Julia La Roche discuss.