A phonorecord by Alexander Graham Bell, one of the Smithsonian's trove of recordings left there by the inventor of the telephone. Richard Strauss/Smithsonian's National Museum of American History Via AP hide caption

"House Arrest" by Nikahang Kowsar: Mir Hossein Mousavi, a presidential candidate in the disputed 2009 presidential election, and his wife have been under house arrest with no charge brought against them, since early 2011. International Campaign for Human Rights in Iran hide caption

The Miami group Tiempo Libre combines hip-hop, R&B, rock and pan-Latin sounds to create a distinctive version of Cuban party music known as timba. Courtesy of the artist hide caption