A vendor sells seafood at a market in East Broadway in New York City's Chinatown. There was a 17 percent drop in the population of New York City's Chinatown over the past decade, and some say it's a sign that Chinatown is becoming more of a symbolic touchstone. Rebecca Sheir/NPR hide caption

itoggle caption Rebecca Sheir/NPR

Hesham Abdul Ghani and his wife, Oras Touma, came to Michigan to escape religious persecution. Jacki Lyden/NPR hide caption

itoggle caption Jacki Lyden/NPR

President Obama, Vice President Joe Biden and members of his National Security team receive an update on the mission against Osama bin Laden in the Situation Room of the White House. A classified document seen in this photograph has been obscured. Pete Souza/White House hide caption

itoggle caption Pete Souza/White House

A trader walks in New York City's financial district on Sept. 12, a day when stocks fell early based on fears that the Greek government would default, then rallied on news that China might buy Italian debt. This year, what sent the market into a tailspin often took place overseas. Spencer Platt/Getty Images hide caption

itoggle caption Spencer Platt/Getty Images

Anna Hu at the Ao Hua Farmers Market in Shanghai. After years of working long hours and eating only in restaurants, Hu has learned how to cook vegetables and eat more healthfully. Eliza Barclay/NPR hide caption

itoggle caption Eliza Barclay/NPR

In this frame grab from an amateur video posted on YouTube, members of the Arab League monitor violence in the Syrian city of Homs this week. YouTube hide caption

itoggle caption YouTube

In this photo released by the U.S. Marines and taken in December 2010, Lance Cpl. Dakota Hicks, from Laharpe, Ill., connects a radio battery to a portable solar panel communication system in Sangin District, in Afghanistan.The U.S. military is trying to wean itself off reliance on fossil fuels by employing solar energy and biofuels, among other measures. Gunnery Sgt. William Price Small/AP hide caption

itoggle caption Gunnery Sgt. William Price Small/AP

The Twitter page for al-Shabab, the radical Islamic group in Somalia that has been branded a terrorist organization by the U.S. Such groups are active in social media, but have not attracted many recruits. Twitter.com hide caption

itoggle caption Twitter.com