September 21: Savannah Guthrie’s exclusive interview with Boris Johnson. Kids and vaccines — and mixed messages on boosters. Latest on the border crisis.

<p>Savannah Guthrie’s exclusive one-on-one conversation with British prime minister Boris Johnson — his thoughts on the U.S. withdrawal from Afghanistan, the pandemic and more. Plus, Johnson & Johnson releases new data on its effectiveness and an update on its booster — this after Pfizer announces its vaccine is safe for children five to 11. Plus: mixed messages on getting that COVID vaccine booster shot. Also ahead, the latest from the border — Haitian migrants deported from Texas border plus NBC News has learned that as many as 20,000 migrants are considering making the same trip.</p>