Deadly mass shooting at a Texas elementary school: We have details on the investigation as authorities look into the suspect's motive and what President Biden said as he addressed the nation.

00:00 Intro
00:45 State senator: 21 killed in Texas school shooting
05:42 18-year-old Texas school gunman dead
07:46 Mass shootings on the rise in the U.S.
10:33 Biden addresses Texas school shooting
13:17 High-stakes primaries test Trump's power
16:17 Brutal battle for eastern Ukraine
18:14 Mass shooting in Texas comes just days after Buffalo massacre

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