Oak Hill Middle School students say goodbye to METCO students heading back to Boston on the bus. Kieran Kesner for NPR hide caption

Bryan Bailey heads home from school with fellow METCO students. Kieran Kesner for NPR hide caption

Delegates from New York hold signs in support of Hillary Clinton during the Democratic National Convention in Philadelphia on Tuesday. Andrew Harrer/Bloomberg via Getty Images hide caption

Ben Haggerty, a.k.a. Macklemore, and Jamila Woods collaborated on the song "White Privilege II." Ariel Zambelich/NPR hide caption

(Top, left) In an exercise designed to open up the conversation between veterans and teenagers, Navy veteran Jamal McPherson waits for others to ask him questions. (Top, right) Veteran Mikhail Dasovich, who served as a Marine in Sangin in Afghanistan, shares his tattoos with participants. (Bottom) Bocanegra speaks at the start of the day's program. Alyssa Schukar for NPR hide caption

Antwan Burns-Jones, 31 (from left), William Moore, 35, and David Lee, 23, add a basketball to the memorial for Tyshawn Lee, 9, who was fatally shot in Chicago's Gresham neighborhood. Chicago Tribune/TNS via Getty Images hide caption

"The Block is like living," outreach worker Nathan Fields says. "These relationships, you've got to keep them flourishing." Meredith Rizzo/NPR hide caption