President Trump held a press conference to discuss the progress of Operation Warp Speed and the development of a coronavirus vaccine. He claimed an agreement had been made with Pfizer to provide the vaccine they are developing "free of charge" but said it was an "unfortunate mistake" when the company said they were not a part of the operation. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews
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