Model Juliana Paesthe (C) of Viradouro samba school participates in the annual carnival parade in Rio de Janeiro's Sambadrome, February 15, 2015. (Photo by Ricardo Moraes/Reuters)
Carnival revellers carry burning wooden sticks during the traditional Swiss Chienbaese celebration in Liestal near Basel February 22, 2015. (Photo by Ruben Sprich/Reuters)
A worker stands on a ladder in front of a huge display at the exhibition stand of Italian carmaker Ferrari during the first press day, ahead of the 85th International Motor Show in Geneva March 3, 2015. REUTERS/Arnd Wiegmann
Australia supporters celebrate a six during their Cricket World Cup match against Sri Lanka in Sydney, March 8, 2015. REUTERS/Jason Reed (AUSTRALIA - Tags: SPORT CRICKET)
A member of gay and lesbian organizations puts on a mask during a march in support of the Civil Union project law in Lima, March 7, 2015. REUTERS/Enrique Castro-Mendivil (PERU - Tags: POLITICS SOCIETY)
“The power of nature”. Magma, ash and gas erupt from Mount Etna in December 2015, rising to a height of several kilometres. Winner: Nature. (Photo by Giuseppe Mario Famiani/SIPA Contest)
The front wheels of a tractor, pulling a trailer overloaded with sugarcane, are seen lifted off the ground as it passes through the streets of Karor Lan Esan, Pakistan December 6, 2015. (Photo by Caren Firouz/Reuters)
Rebel fighters from the Ahrar al-Sham Islamic Movement fire a heavy machine gun during what they said was an offensive to take the northwestern city of Idlib March 24, 2015. (Photo by Khalil Ashawi/Reuters)