President Obama is the first sitting president to visit a federal prison. Kevin Lamarque/Landov hide caption

itoggle caption Kevin Lamarque/Landov

High school students in the Johns Hopkins University summer program, Engineering Innovation, compete in an annual spaghetti bridge-building competition. Above: The A'hunna Key-Lows push their bridge to the limit. Below: The Key-Lows' winning bridge shatters — but only after holding 53 pounds. Lydia Thompson/NPR hide caption

itoggle caption Lydia Thompson/NPR

Eliot Elementary in St. Louis, Mo., closed 10 years ago. The building remains empty. Tim Lloyd/ St. Louis Public Radio hide caption

itoggle caption Tim Lloyd/ St. Louis Public Radio

Cooper is known as the Swim Whisperer. He's been teaching swimming full-time since 1995. Elissa Nadworny/NPR hide caption

itoggle caption Elissa Nadworny/NPR

Head coach Po-Shen Loh (far left) and assistant coaches John Berman and Alex Zhai (far right) flank the members of the winning squad: Shyam Narayanan, David Stoner, Michael Kural, Ryan Alweiss, Yang Liu and Allen Liu. Courtesy of Po-Shen Loh hide caption

itoggle caption Courtesy of Po-Shen Loh

Sandy Kress (right) an attorney from Dallas, listens to Texas Education Agency general counsel David Anderson in 2004. Kress was the chief education consultant to the Bush administration's No Child Left Behind initiative. Harry Cabluck/AP hide caption

itoggle caption Harry Cabluck/AP

Here's the group of "teen advisers" who spoke with Goats and Soda at the 2015 Girl Up conference in Washington, D.C. Top row: Amy Gong Liu, Janet Diaz, Janet Ho, Kennede Reese, Rebecca Ruvalcaba. Middle row: Ruhy Patel, Celia Buckman, Simone Cowan, Jessica Bishai. Bottom row: Sydney Baumgardt, Alexandra Intriago, Anna McGuire, Ishana Nigam John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR