Boris Johnson takes over as British PM, introducing teen girls to wargaming, health risks for migrant children detained at the border, and more.

We discuss the challenging moment facing Boris Johnson; helping teen girls get their start in national security; whether U.S. educators are prepared to work with diverse students; potential health problems for migrant children held at the U.S. southern border; a spike in arrest rates for America’s youth; and healing after school shootings. For more information on this week’s episode, visit rand.org/podcast.