Maxima Guerrero and Daniel Rodriguez canvass for votes in Phoenix. Rodriguez moved to the U.S. with his mother when he was a child, and is undocumented. "The best thing I can do now," he says, "is organize those that can [vote], and make them vote for me." Andrea Hsu/NPR hide caption

Two of the most valuable cards in the collection: Ty Cobb (left) and Honus "Hans" Wagner. Heritage Auctions hide caption

Dogs wait to be adopted at the Animals Without Home shelter south of Paris in Montgeron, France, in August 2010. France is among the European countries with the highest number of abandoned pets during the summer months, when people take long vacations. Joel Saget/AFP/Getty Images hide caption

Shyanne (left) holds 1-year-old Makai, as Stepp checks to see if all of Shyanne's homework has been completed. Kainaz Amaria/NPR hide caption

July 14, 2012, is the 100th anniversary of Woody Guthrie's birth. Al Aumuller/Courtesy of the Woody Guthrie Archives hide caption

A PET scan of the brain of a person with Alzheimer's disease. U.S. National Institute on Aging/via Wikimedia Commons hide caption

Hyungsoo Kim brought his sons Woosuk (left) and Whoohyun to California from Korea so the boys could get an American public-school education. In "goose families," one parent migrates to an English-speaking country with the children, while the other parent stays in Korea. Martin Kaste/NPR hide caption

Firefighter John Lauer, seen at the scene of a wildfire in Montana, led a campaign for health coverage of seasonal firefighters and their families. Courtesy of John Lauer/AP hide caption

Released last month, La Voix de la Révolution is a new compilation of songs by Sory Kandia Kouyaté, who died in 1977. Courtesy of the artist hide caption