This photo shows rocks that have moved across a dry lake bed in Death Valley National Park in California's Mojave Desert. For years scientists have theorized about how the large rocks ó some weighing hundreds of pounds ó zigzag across Racetrack Playa leaving long trails etched in the earth.
A visitor looks at the traveling Vietnam Wall, now set up in Ludington City Park, in Ludington, Mich.
A Pro-Russian separatist stands near the damaged war memorial at Savur-Mohyla, a hill east of the city of Donetsk.
Serena Williams of the U.S. hits a return to compatriot Vania King at the 2014 U.S. Open tennis tournament in New York.
Rescue workers search the site of a landslide in Fuquan, Guizhou province. According to Xinhua News Agency, at least seven people were killed in the landslide and 20 remained missing.
Tianna Bartoletta of the U.S. competes in the women's long jump event during the Weltklasse Diamond League meeting at the Letzigrund stadium in Zurich.
Paramilitary police officers hold the Chinese national flag in a flag-raising ceremony during the closing ceremony of the 2014 Nanjing Youth Olympic Games in Nanjing, Jiangsu province.
Serena Williams, of the United States, pauses before serving against Vania King, of the United States, during the second round of the 2014 U.S. Open tennis tournament.
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