Sean Morey, then with the Arizona Cardinals, celebrates after blocking a punt against the Seattle Seahawks in 2007. Morey, who suffers from post-concussion syndrome, retired from the NFL in 2010 on the advice of doctors. Stephen Dunn/Getty Images hide caption

Gund Kwok troupe member Heang Ly takes a break next to her lion costume during a rehearsal in Boston's Chinatown. Hansi Lo Wang/NPR hide caption

Performers get ready before the start of a Chinese New Year parade in Hong Kong on Jan. 31. Philippe Lopez/AFP/Getty Images hide caption

When state prison populations were at their peak, prisons like San Quentin in California used gymnasiums to house inmates in bunks. Now it's the federal prison system that's overcrowded. The Bureau of Prisons says it's 35 to 40 percent over capacity. Eric Risberg/AP hide caption

The Roxie Theater in San Francisco still has two 35 millimeter projectors, but the switch to digital is inevitable. Laura Sydell/NPR hide caption

A portrait of Fred Korematsu presented at the National Portrait Gallery in Washington, D.C. Mandel Ngan/AFP/Getty Images hide caption

SpaceX's Dragon spacecraft atop rocket Falcon 9 lifts off from Cape Canaveral in Florida in May 2012. The launch made SpaceX the first commercial company to send a spacecraft to the International Space Station. Roberto Gonzalez/Getty Images hide caption

A drilling site rises from the middle of farmland near Fairfield, N.D. Many farmers and ranchers are profiting from the state's oil boom, but others complain that drillers are interfering with their business. Jeff Brady/NPR hide caption

Graffiti artist Mauro Palotta says Pope Francis is the only world leader who stands on the side of the people. Sylvia Poggoli/NPR hide caption

In 1984, an American Army unit engaged in this firefight as it shielded a Soviet defector who made a break across the Demilitarized Zone between North Korea and South Korea. Thirty years after the battle, one of the U.S. soldiers, Mark Deville, has finally received a Silver Star for his bravery. Courtesy of Mark Deville hide caption

Wuhan, in central China, is in debt to the tune of a reported $33 billion — nearly twice the city's GDP. This 17-mile highway sat dormant for two years after banks cut off funding as Wuhan's debt ballooned. Work on the road resumed last year, but the construction company still hasn't been paid. Frank Langfitt/NPR hide caption

An abandoned General Motors automotive assembly plant near Dayton, Ohio, will soon become home to Fuyao Auto Glass, a Chinese windshield maker. AFP/Getty Images hide caption

Ala'a Miqbel (shown here with his wife and their youngest son in their Gaza City apartment) was held for nearly four weeks in an Israeli prison, then released without charges. There, he met the "sparrows" — Palestinians who appear to be fellow prisoners but are actually gathering information for the Israelis. Emily Harris/NPR hide caption

Paul Gibson works on the Geo-Spring hybrid water heater at General Electric's Louisville, Ky., plant. For many years, GE outsourced manufacturing of the water heater to a company in China. But in 2009, it decided to bring production back to the U.S. Jackie Northam/NPR hide caption