Three years ago, Rufus McDonald found historic documents in an abandoned house and took them to a rare-books dealer. The papers and books belonged to Richard T. Greener, a 19th century intellectual who was the first African-American to graduate from Harvard University. Cheryl Corley/NPR hide caption

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Dannaer Fields, who went by Donna, is shown in this undated photo. She was one of three people killed in Friday's shootings in Tulsa, Okla. Courtesy Of News On 6 hide caption

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Alvin Watts (left), 33, and Jacob England, 19, were arrested following an appeal to the public to help police solve the five shootings that happened Friday. A police spokesman said the two face three counts of first-degree murder and two counts of shooting with intent to kill. AFP/Getty Images hide caption

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Florida State Attorney Angela Corey (center) has been assigned to lead the investigation into the shooting death of Florida teenager Trayvon Martin. Kelly Jordan/The Florida Times-Union hide caption

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Rep. Jesse Jackson Jr. and his wife, Chicago alderman Sandi Jackson, ask each other for their support and votes as they arrive at a polling station for early voting in Chicago on March 9. M. Spencer Green/AP hide caption

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The University of North Dakota's Brad Eidsness makes a save during a game against the Minnesota Golden Gophers. Since 2005, there have been a series of lawsuits and legislative actions over the nickname for the school's athletic teams, the "Fighting Sioux." Josh Holmberg/AP hide caption

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Applicants fill out forms at a Miami jobs fair hosted by the Congressional Black Caucus. An NPR/Kaiser survey found blacks make up about 10 percent of the full-time working population but 27 percent of the long-term unemployed. Lynne Sladky/AP hide caption

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This small juvenile skunk was caught by Des Plaines, Ill., homeowner Richard Kaulback. He says there have always been raccoons and opossums in the Chicago area, but this year, skunks have become prolific. Cheryl Corley/NPR hide caption

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Chicago Mayor Rahm Emanuel, shown in his office earlier this month, will mark 100 days in office on Tuesday. The former congressman and White House chief of staff says that as mayor, "you get a way to make decisions about topics that are close to home in the way people live their lives." M. Spencer Green/AP hide caption

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Michael Harvey's novels focus on cop-turned-P.I. Michael Kelly and his life and work in the Windy City. Citizen Erased! via Flikr hide caption

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Rahm Emanuel celebrated with supporters at the Journeymen Plumbers' Union Local 130 Hall after winning the mayoral election in February. Now, Emanuel is in a test of wills with unions over closing the city's massive budget gap. Scott Olson/Getty Images hide caption

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