A woman, her face covered with colored powders, smiles during the Holi Festival of Colors in Lisbon. (AP Photo/Francisco Seco)

Salvage crew members float in front of the capsized Costa Concordia cruise liner after the start of the "parbuckling" operation outside Giglio harbor, Italy. Engineering teams began lifting the wrecked liner upright on Monday, the start of one of the most complex and costly maritime salvage operations ever attempted. (REUTERS/ Tony Gentile)

Ou Mei, a 45-year-old migrant construction worker, shields her face from dust at a construction site in Shanghai. Around a third of China's millions of rural-urban migrant workers are women, and according to an academic paper published in 2010, they earn about a third less than their male equivalents.(REUTERS/Aly Song)

American flags surrounding the Washington Monument fly at half-staff, as ordered by President Obama following a deadly shooting on Monday at the Washington Navy Yard. (AP Photo/J. Scott Applewhite, File)

Members of the Rocky Mountain Rescue Group relax on Main Street in Jamestown, Colo., after a flash flood destroyed much of the town. (REUTERS/Rick Wilking)

Young Nepalese girls in their traditional attire wait for Kumari Puja in Katmandu, Nepal. More than 100 girls gathered for the tradition of worshiping manifestations of the divine female energy, a community affair held primarily to save small girls from diseases and bad luck in the years to come. (AP Photo/Niranjan Shrestha)

Floyd Mayweather, Jr. lands a punch against Canelo Alvarez in the third round of their title fight in Las Vegas. (AP Photo/Mark J. Terrill)

A Pakistani girl applies lipstick to her friend in an alley on the outskirts of Islamabad. (AP Photo/Muhammed Muheisen)

A man rides a motorcycle with his children along the top of a dam, which was flooded by an overflowing river near Junyue township, in China. (REUTERS/Stringer)

England center Manu Tuilagi gives Britain's Prime Minister David Cameron (center) "bunny ears," as he poses with the British and Irish Lions rugby squad. (REUTERS/Chris Harris/pool)

Kennel owner Gabor Korozs walks one of his Komondors, a traditional Hungarian guard dog, in Bodony, northeast of Budapest. (REUTERS/Laszlo Balogh)

Pitched tents dot the site of the 2013 International I Camping Festival, on Mount Wugongshan, Pingxiang, China. The event attracted more than 15,000 campers from all over the world. (REUTERS/Stringer)

**Want more photos? Check out last week's best photojournalism**