President Biden is pushing for new gun-control measures after the mass shootings in Atlanta and Boulder. Plus, what relaxed rules for art sales mean for the future of museums. Read more:Biden is urging Congress to immediately pass stronger gun laws after two mass shootings in less than a week. Reporter Sean Sullivan lays out Biden’s agenda on guns and discusses the challenge he faces in seeing that agenda through. Museums have begun using the money from art sales to help them survive the pandemic, but critics say that sets a dangerous precedent. Reporter Peggy McGlone explains.