July 28, 2011. Aid groups, which have been clamoring for money to help famine-stricken Somalia, are struggling to reach millions in the affected areas. Some 3.7 million Somalis risk starvation in two regions of south Somalia controlled by Islamist al Shabaab militants. Yet more than 2 million of them have not received any help. Source: Reuters

A multiple-exposure image of Novak Djokovic of Serbia, as he serves during the men’s singles match against Janko Tipsarevic of Serbia during the Barclays ATP World Tour Finals at the O2 Arena in London, England, on November 25, 2011. (Michael Regan/Getty Images for Barclays)

An aerial photo shows a residential area being hit by a tsunami in Natori, Miyagi prefecture on March 11, 2011.

A heifer charges at a reveller after the last running ofthe bulls at the San Fermin festival in Pamplona July 14, 2011. There were no serious injuries during the run that lasted two minutes and 20 seconds, according to local news sources. Source: Reuters

Lightning flashes around the ash plume at above the Puyehue-Cordon Caulle volcano chain near Entrelagos June 5, 2011. The volcano in the Puyehue-Cordon Caulle chain, dormant for decades, erupted in south-central Chile on Saturday, belching ash over 6 miles (10 km) into the sky, as winds fanned it toward neighboring Argentina, and prompted the government to evacuate several thousand residents, authorities said. Picture taken June 5. Source: Reuters

The Russian Soyuz TMA-21 spacecraft, named after the first cosmonaut Yuri Gagarin, carrying the International Space Station (ISS) crew of U.S. astronaut Ronald Garan and Russian cosmonauts Alexandr