1 of 6. The passage of asteroid 2012 DA14 through the Earth-moon system, is depicted in this handout image from NASA. On February 15, 2013, an asteroid, 150 feet (45 meters) in diameter will pass close, but safely, by Earth. The flyby creates a unique

Sergei Filin, artistic director of Russia's Bolshoi Ballet, speaks to journalists as he leaves a hospital in Moscow February 4, 2013. Credit: Reuters/Vselovod KutznestovMOSCOW | Thu Feb 14, 2013 2:25pm EST MOSCOW (Reuters) - Principal dancer Artem Ovcharenko

1 of 5. A visitor to the Justice and Police Museum looks at paintings that are part of the exhibition titled ''Wicked Women'' in Sydney February 13, 2013. The paintings in award-winning Australian artist Rosemary Valadon’s latest exhibition, ''Wicked

1 of 2. A research worker of the Ural Federal University inspects a fragment of a material substance in Yekaterinburg, the province of Sverdlovsk capital in the Ural Mountains, February 18, 2013. Scientists, representing the Ural Federal University,

U.S. President Barack Obama speaks about strengthening the economy for the middle class and measures to combat gun violence during a visit to Hyde Park Academy in Chicago, Illinois February 15, 2013. Credit: Reuters/Kevin LamarqueBy Steve HollandCHICAGO

Demonstrators carry a replica of a pipeline during a march against the Keystone XL pipeline in Washington, February 17, 2013. Credit: Reuters/Richard ClementWASHINGTON | Sun Feb 17, 2013 6:37pm EST WASHINGTON (Reuters) - Thousands of protesters gathered