Sen. Lindsey Graham, R-S.C. announces his candidacy for president in Central, S.C. on June 1. Jessica McGowan/Getty Images hide caption

The Oregon Trail looms large in the American imagination. But journalist Rinker Buck and his brother Nick set out to see what the experience was really like — miseries and all. Albert Bierstadt/Public Domain hide caption

To make baby back ribs in an hour, instead of the usual three to four hours, you'll need a pressure cooker. Photo Illustration by Ryan Kellman and Emily Bogle/NPR hide caption

Philip Cheruiyot (second from left) leans in to read the song titles on the CD booklet brought by Diane Thram. Cheruiyot's grandfather sang on Hugh Tracey's recording of "Chemirocha II." Ryan Kailath hide caption

Berlin's Humboldt University — named for its founder, the 19th century philosopher and linguist Wilhelm von Humboldt, and his brother, naturalist Alexander von Humboldt, pictured here — is one of several German universities attracting U.S. students. More than 4,000 Americans are studying in German universities. Markus Schreiber/AP hide caption

Civil rights leader Bayard Rustin, left, and Walter Naegle, right, became partners in the 1970s and were together until Rustin's death. Decades before gay marriage was an option, Rustin adopted Naegle to lend legal protection to their relationship. StoryCorps hide caption

An aerial view shows the Yarnell Hill fire burning June 29, 2013 near the town of Yarnell, Ariz. The next day, 19 firefighters died battling the blaze. Arizona State Forestry Division/Getty Images hide caption

The Villalobos Brothers, with their combination of traditional Mexican music and lyrics inspired by modern themes, are accompanying a Frida Kahlo exhibit at the New York Botanical Garden. Candiani & Chillopa Fotografia hide caption