Inside the DHS lab where researchers study coronavirus
02:31
Researchers at a secure Homeland Security lab now have one priority: to understand how the coronavirus spreads and infects so easily. They’re working to answer questions about how long the virus remains in the air and the impact of sunlight.May 6, 2020
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NBC News’ Lester Holt speaks to victims of Highland Park shooting
04:27
As U.S. travel chaos begins to ease, European airports are facing summer passenger surges
00:46
After the Highland Park shooting Lester Holt searches for perspective
00:55
Highland Park July 4th parade shooting was weeks in the making, investigators reveal
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Brittney Griner pleads with President Biden to bring her home in handwritten letter
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Over a dozen mass shootings this July 4th weekend in the U.S.
