Dr. Martin Tobin, an expert pulmonologist, testified that George Floyd died from a “low level of oxygen.” The prosecution showed jurors a 3D animation of what happened, and Dr. Tobin said any preexisting conditions had no connection to Floyd’s death. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative …

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The CDC says a nationwide surge in Covid-19 cases affecting young people is linked to the U.K. variant, President Biden announces executive actions on gun control following multiple mass shootings across the country, witnesses analyze George Floyd’s words from police body-camera footage in the Derek Chauvin trial. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC …