Los Angeles saw a dramatic boom in growth after the construction of the Los Angeles Aqueduct in 1913. The system delivers water from the Owens River in the Eastern Sierra Nevada Mountains to the city. Mark J. Terrill/AP hide caption

Democratic Sen. Cory Booker, formerly mayor of Newark, N.J., arrives in the Old Senate Chamber on Thursday for an oath-of-office ceremony. J. Scott Applewhite/AP hide caption

Mirrors erected on a Norwegian mountainside reflect sunlight onto the town below, which is cut off from direct sunlight for about six months a year. NTB Scanpix/Reuters/Landov hide caption

Little oil lamps mark Diwali celebrations in Allahabad, India, far away from American homes. Sanjay Kanojia/AFP/Getty Images hide caption

After years of attending church dances, Step Rideau says he was moved to connect with his heritage on a deeper level. Courtesy of the artist hide caption

Best known for the Discworld fantasy series, Terry Pratchett was diagnosed with a rare form of Alzheimer's disease in 2007. But that hasn't kept him from continuing to write. Rob Wilkins/Courtesy of Clarion hide caption