April 21: More severe weather amid recovery efforts. Biden set to announce 2024 run. New details on Hunter Biden investigation. SpaceX rocket explodes during test flight.

<p>Millions of people at risk for severe weather as Oklahoma cleans up from deadly overnight tornadoes. Also, President Biden is set to launch his re-election bid next week. Plus, new details in the investigation surrounding Hunter Biden. And, SpaceX rocket explodes minutes after launch from Texas.</p>