A Saudi woman crosses in front of several automobiles in a marketplace on Sept. 16, 1990, in Dammam. Women in Saudi Arabia are not allowed to drive, have little say in matters of marriage and divorce, and cannot travel without a letter of permission from their male guardian. David Longstreath/AP hide caption

itoggle caption David Longstreath/AP

The last time NPR's Eric Westervelt saw backpacker Billy Six, he was at Benghazi's port trying to catch a boat ride to the besieged city of Misurata. Nasser Nasser/AP hide caption

itoggle caption Nasser Nasser/AP

Libyan women hold pictures of leader Moammar Gadhafi in Tripoli earlier this month during a protest against the U.N. resolution authorizing a no-fly zone. The government, says NPR's David Greene, wants Tripoli to seem like a place full of people who revere Gadhafi. There are signs, however, that Gadhafi's grip on the capital could be loosening. Mahmud Turkia/AFP/Getty Images hide caption

itoggle caption Mahmud Turkia/AFP/Getty Images

Decades ago, the border fence near the port of entry at Nogales, Ariz., and Nogales, Mexico, was made of wire mesh. Now it's a thick steel wall covered with graffiti. Loosely translated, this part of the wall says "Walls Equal Death," although the end of the phrase is not shown. Claudio Sanchez/NPR hide caption

itoggle caption Claudio Sanchez/NPR

As winter approaches, Bill Thompson gave Melissa Block's backyard in Washington, D.C., a bird feeding makeover. "It's the time of year most folks start feeding actively, cause we get a lot of the northern birds coming down for the winter, to what they feel is our milder climate," he says. Here, an Eastern bluebird sits on an icy feeder. Bill Thompson III hide caption

itoggle caption Bill Thompson III

The deep-water-research submarine Alvin is launched from Atlantis. Scientists are studying how ecosystems in the Gulf of Mexico may have been affected by the Deepwater Horizon oil spill. Richard Harris/NPR hide caption

itoggle caption Richard Harris/NPR

Russian councilman Jean Gregoire Sagbo speaks in the administration office in Novozavidovo, a village 60 miles north of Moscow, on July 20. As the first black man elected to public office in Russian history, he has been nicknamed Russia’s Obama, something he’s not too pleased about. Sergey Ponomarev/AP hide caption

itoggle caption Sergey Ponomarev/AP