As a national debate rages over masks, Pfizer now says a third COVID-19 shot could “strongly” boost protection against the highly contagious Delta variant. Plus, officials on Long Island have a warning for swimmers, beware of sharks. Original source (ABC/Youtube)

Richarlison wasted no time putting his stamp on these Olympics, posting a hat trick within the first half-hour and helping Brazil get their gold-medal defense off to … source

Public workers react to new federal Covid-19 vaccine mandate, the bipartisan infrastructure bill passes another hurdle in Congress, what to do if you get an eviction notice, and survivors of human trafficking share their stories. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC​ » Watch more NBC video: http://bit.ly/MoreNBCNews​ NBC News Digital is a collection of innovative and powerful news brands that …