A new piece in The Atlantic suggests that wealthier Americans should stop "wasting" COVID-19 tests on social engagements and that instead, tests should be reserved for people who need them most. The author of the article, Dr. Benjamin Mazer, joins us. And, as part of a response to a tornado that killed more than 160 people, Joplin, Missouri, developed a peer-to-peer mental health program that's been widely replicated. KCUR's Frank Morris reports.