US to start offering Pfizer, Moderna booster shots for COVID-19 in September

In today's top stories, Americans can get Pfizer, Moderna COVID-19 booster shots starting in September. In other news, Amazon reportedly warns sellers of harm from congressional antitrust bills. And finally, scientists at the National Ignition Facility took a significant step forward in the pursuit of nuclear fusion, a long-sought-after panacea for many energy and environmental challenges.