Weekend Edition Saturday host Scott Simon documented his mother's final days to his more than 1.2 million Twitter followers. Stephen Voss/NPR hide caption

Well-wishers have gathered outside of Nelson Mandela's hospital to offer their support. Andy Carvin/NPR hide caption

Erdem Gunduz (center) stands in Instanbul's Taksim Square early Tuesday. After weeks of clashes with police, many Turkish protesters were inspired to emulate Gunduz, and stand silently. Petr David Josek/AP hide caption

Anti-government protesters demonstrate in Ankara on Tuesday. Umit Bektas/Reuters/Landov hide caption

Online activist Ali Abdulemam (right) is greeted in Manama, Bahrain, on Feb. 23, 2011, shortly after anti-government protests began. Wanted by the government, he went into hiding the following month. He escaped from Bahrain after two years underground and made his first public appearance Wednesday in Oslo, Norway. Mazen Mahdi/EPA/Landov hide caption

The twitter account of @Al_firdausiA Twitter hide caption

Libyans attend the Friday market the gardens inside the Bab al-Azizia compound in Tripoli, on Oct. 28, 2011. Marco Longari/AFP/Getty Images hide caption

Journalist Marie Colvin (second from left) poses with Libyan rebels in Misrata on June 4, 2011. She was killed in the besieged Syrian city of Homs on Wednesday. Later that day in Tripoli, fellow war correspondents gathered to remember her. Zohra Bensemra/Reuters/Landov hide caption

Danny Vampire, "a battle-hardened veteran of Libya's 2011 revolution." Andy Carvin hide caption

The grave of Mohamed "Mo" Nabbous is seen in Libya. Mo was killed by a sniper on March 19, 2011 while filming Libya's revolution. Andy Carvin/NPR hide caption

Libyan flags fly above the cars lining the streets of Benghazi. Andy Carvin/NPR hide caption