A big crowd turned out for the March of Dimes walkathon in Gainesville in early March. But overall, the March of Dimes' March for Babies raised $3.5 million less in 2014 than it did the year before. Elizabeth Hamilton/Gainesville Sun/Landov hide caption

itoggle caption Elizabeth Hamilton/Gainesville Sun/Landov

State police officers patrol a highway between Ciudad Victoria and Matamoros, in northeast Mexico, in 2011. Mexico's drug and turf wars have descended on the once tourist-friendly border town of Matamoros. Alexandre Meneghini/AP hide caption

itoggle caption Alexandre Meneghini/AP

Beginning April 1, all sugary beverages and food of "minimal-to-no nutritional value" sold on the Navajo reservation will incur an additional 2-cent tax. April Sorrow/Flickr hide caption

itoggle caption April Sorrow/Flickr

Morning traffic makes its way toward downtown Los Angeles along the Hollywood Freeway, past an electronic sign warning of severe drought. California Gov. Jerry Brown introduced the state's first mandatory water reduction measure this week. Richard Vogel/AP hide caption

itoggle caption Richard Vogel/AP

The H Street Wal-Mart in Washington, D.C. Ten years ago, none of the city's 600,000 residents lived within 1 mile of a Wal-Mart. Today, almost 13 percent do. Emily Jan/NPR hide caption

itoggle caption Emily Jan/NPR

Iraqi security forces and allied Shiite militiamen look for Islamic State extremists in Tikrit on Tuesday. Iraqi forces were going house-to-house Tuesday in search of snipers and booby traps. Khalid Mohammed/AP hide caption

itoggle caption Khalid Mohammed/AP

Fulton County Superior Court Judge Jerry Baxter makes a ruling on allowing evidence in the test-cheating trial at the Fulton County Superior Court in Atlanta in October 2014. Kent D. Johnson/Atlanta Journal-Constitution / AP hide caption

itoggle caption Kent D. Johnson/Atlanta Journal-Constitution / AP

Prolonged nuclear talks gave Russian journalists time to play a game of giant chess Wednesday in a courtyard of the Beau-Rivage Palace Hotel in Lausanne, Switzerland. Brendan Smialowski/AP hide caption

itoggle caption Brendan Smialowski/AP