United States Marines perform a fighting demonstration in Times Square as part of Fleet Week festivities May 27, 2011 in New York City. Fleet Week, which has been held in New York since 1984, brings thousands of military members to the city where they engage the public with numerous activities, demonstrations, tours and contests. Fleet Week concludes on Memorial Day with a military flyover to honor those killed while serving in the military. (Photo by Spencer Platt/Getty Images)

Sara Takanashi of Japan, Maja Vtic from Slovenia and Germany's Carina Vogt (R-L) prepare for a training session of the women's Individual normal hill HS100 ski jumping at the Nordic World Ski Championships in Falun February 18, 2015. (Photo by Kai Pfaffenbach/Reuters)

The picturesque Zao Ski Resort, one of Japan's oldest and most popular ski destinations, is illuminated on February 10, 2007 in Yamagata Prefecture, Tohoku region of Honshu island, Japan. Coniferous trees such as the Aomori white fir lie covered with chrystallised ice and snow (described as “silver frost” or “snow monsters”) and attract visitors. (Photo by Koichi Kamoshida/Getty Images)

Afghan paraglider Leeda Ozori, 21, walks after practicing in Kabul, Afghanistan September 14, 2015. She is one of a group of young Afghans taking to the skies of a capital where military helicopters and surveillance balloons are a far more familiar sight. Women in Afghanistan's conservative Muslim society are increasingly entering areas such as education, sports and the workplace, but most still wear the head-to-toe garment, the burqa. (Photo by Mohammad Ismail/Reuters)

This picture taken on January 12, 2014 shows pet dogs, a yellow duck and a chicken in a skiing resort for a skiing competition in Sanmenxia, north China's Henan province. A tortoise beat a rabbit in a skiing competition held for pets and their owners in northern China, a report said on January 14. Cats and dogs faced off against a menagerie including a rooster and a yellow duck in a race to the finish line on snowy slopes in China's Hebei province, the state-run China News Service said. (Photo by AFP Photo)

A participant jumps on vintage skis during a traditional historical ski race in the northern Bohemian town of Smrzovka, Czech Republic, February 20, 2016. (Photo by David W. Cerny/Reuters)

Hot air balloons take to the skies over Bristol city centre on August 6, 2012 in Bristol, England. The early morning flight of over twenty balloons over the city was organised as a curtain raiser for the four-day Bristol International Balloon Fiesta which starts on Thursday. Now in its 34th year, the Bristol International Balloon Fiesta is Europe's largest annual hot air balloon event in the city that is seen by many balloonists as the home of modern ballooning. (Photo by Matt Cardy)

Customers try out the the new iPad2 shortly after it went on sale at the Fifth Avenue Apple store March 11, 2011 in New York City. The iPad 2 became available at 4:00 a.m. Eastern time for online purchase and at 5:00 p.m. today in over 10,000 retail locations.