Pfizer July 23, 2021 5:33 pm US Purchases Additional 200M Doses of Pfizer Vaccine White House press secretary Jen Psaki confirmed the U.S. has agreed to purchase 200 million additional doses of the Pfizer/BioNtech COVID-19 vaccine. Local 0:44 Virginia gov. sends resources to firefighters battling wildfires 2:12 Recording studio shooting marks Laurel's first homicides of 2024 1:22 Maryland designer behind Hanifa hopes her journey inspires 1:58 MedStar Health gives $100,000 in scholarships to Marymount University physical therapy students 2:34 How AI is being used on Prince George's roads to improve safety