"The optimist in me says in three years we can train this tool to read mammograms as well as an average radiologist," says Connie Lehman, chief of breast imaging at Massachusetts General Hospital in Boston.
Kayana Szymczak for NPR
President Trump at the signing ceremony for the First Step Act in December. While some prisoners are benefiting from reduced sentences, implementation of other aspects of the law has been hit with delays.
Jim Watson/AFP/Getty Images
Arthur Brooks, seen speaking at Georgetown University in 2015, has a new book called Love Your Enemies: How Decent People Can Save America from the Culture of Contempt.
Pablo Martinez Monsivais/AP