Pentagon: COVID-19 vaccine no longer mandated for troops

The Pentagon has formally dropped its COVID-19 vaccination mandate, but a new memo signed by Defense Secretary Lloyd Austin also gives commanders some discretion in how or whether to deploy troops who are not vaccinated.

What is cardiac arrest?

Buffalo Bills player Damar Hamlin suffered cardiac arrest while on the field Monday night. Cardiologist Dr. Shukri David explains what that means, and what could have caused it.