NPR's Scott Simon reads W.H. Auden's "September, 1, 1939," a poem that resonates with the smoke and destruction witnesses in the wake of the Sept. 11, 2001 attacks.
After the attacks, barriers and thigh-high cement bollards sprouted up seemingly overnight in Washington, D.C. But new threats show the need for adaptability.
President Biden called on Americans to embrace unity as they reflect on the day that two decades ago reshaped the nation. "Unity is what makes us who we are: America at its best," he said.
The COVID-19 vaccines continue to provide powerful protection, even against the delta variant, the CDC said. It also found that vaccinated people were 10 times less likely to be hospitalized.
NPR's Scott Detrow talks with White House Climate Advisor Gina McCarthy about this summer's extreme weather events and how the Biden administration is trying to address climate change.
NPR's Ailsa Chang speaks with Megan Reilly, interim superintendent for the Los Angeles Unified School District, about the decision to require all students 12 and older to be vaccinated against COVID.
At least 67 undocumented immigrants, mainly from Mexico and South America, who worked at the World Trade Center on Sept. 11, are still considered missing.