Title: Freestyle skiing
Content:  Halfpipe skiing is the sport of riding snow skis on a half-pipe. Competitors gradually ski to the end of the pipe by doing flips and tricks. It became an Olympic event for the first time at the 2014 Olympic Games in Sochi, Russia.
Title: Half-pipe skiing
Content:  Half-pipe skiing is the sport of riding snow skis on a half-pipe. Competitors perform a series of tricks while going down the pipe. The current world record for highest jump in a half-pipe is held by Joffrey Pollet-Villard, with 26 ft. The sport is considered to be dangerous compared to other sports, and helmets are required to be worn during competitions. Half-pipe skiing has been part of the Winter X Games since 2002, and made its Olympic debut at the 2014 Winter Olympics in Sochi, Russia. David Wise of the United States of America became the first Olympic champion in this discipline with a total of 92.00 points.
Title: Half-pipe skiing
Content:  Half-pipe skiing was formally endorsed by the International Ski Federation in June 2010, and was approved by the International Olympic Committee in April 2011 to be an official sport 2014 Olympic Games in Sochi, Krasnodar Krai, Russia. It has been a part of the Winter Dew Tour, the World Skiing Invitational, and the inaugural 2012 Winter Youth Olympics. The current world record for the highest half-pipe ski jump was set in 2015, and is held by Joffrey Pollet-Villard with 26 feet and 3 inches (8.00 metres).
Title: Freestyle skiing at the 2014 Winter Olympics – Women's halfpipe
Content:  The women's halfpipe event in freestyle skiing at the 2014 Winter Olympics in Sochi, Russia is currently taking place, on 20 February 2014. In April 2011 freestyle halfpipe was added to the Olympic program, meaning the event is making its Olympic debut.
Title: Freestyle skiing at the 2014 Winter Olympics – Men's halfpipe
Content:  The men's halfpipe event in freestyle skiing at the 2014 Winter Olympics in Sochi, Russia took place 18 February 2014. In April 2011 freestyle halfpipe was added to the Olympic program, meaning the event will make its debut.
Title: Half-pipe skiing
Content:  Waugh, a machinery mechanic came out with a machine, the Pipe Dragon, that could groom the slopes on a curve and was instrumental in making half-pipes constructible. The Pipe Dragon was used at all major resorts across Colorado and the West Coast and led to the mainstream culture of half-pipes. Now most every major ski resort in the nation and the world has a half-pipe at some part of the season, if not for the entire season. Many of these resorts also hold local competitions on these half-pipes. Though the half-pipe was mainly seen as a snowboarding activity it grew more popular amongst skiers as the X Games became more popular in the 2000s. In 2014, at the Winter Olympics in Sochi, Russia, the skiing half-pipe competition debuted.
Title: Half-pipe skiing
Content:  was constructed. The first half-pipe championships experienced difficulties constructing a perfect half-pipe, as it had never been done before. Eventually, Sims moved it towards the bottom of the resort to make it less steep and more rideable for snowboarders controlling their speed. In 1986, the World Championship moved to Breckenridge, Colorado. Again, they were met with trouble constructing the half-pipe, as the employees in Breckenridge had never constructed and few had ever seen a half-pipe. After the competition the half-pipe remained for use, becoming the first permanent pipe at a resort and began spreading the awareness of half-pipes. By 1988, half-pipes had become media magnets. From all over the world, magazines, television shows, and newspapers wanted to do stories on the perceived, insane snowboarders riding the half-pipe. In 1991, 
Title: Freeskiing
Content:  name of the Overall World Championship trophy to the Sarah Burke Trophy in honor of the fallen women's skiing pioneer Sarah Burke who died in a 2012 skiing accident in Utah. On April 6, 2011, the International Olympic Committee (IOC) announced the addition of the men's and women's ski halfpipe and slopestyle events to the 2014 Winter Olympics in Sochi. Olympic status for ski halfpipe is expected to have a direct impact on the training, funding, and resources available to athletes. In January 2011, the United States Ski and Snowboard Association launched U.S. Freeskiing in partnership with The North Face, which would presumably supply Olympic uniforms.
Title: Snowboarding at the 2018 Winter Olympics – Men's halfpipe
Content:  The men's halfpipe competition of the 2018 Winter Olympics was held from 13 to 14 February 2018 at the Bogwang Phoenix Park in Pyeongchang, South Korea. The event was won by Shaun White, who previously won this event in 2006 and 2010. Ayumu Hirano, the 2014 silver medalist, took silver. Scott James became the bronze medalist. For James, this is the first Olympic medal, and this was also the second medal for Australia at the 2018 Winter Olympics. In the victory ceremony, the medals were presented by John Dowling Coates, member of the International Olympic Committee, accompanied by Dexter Paine, International Ski Federation vice president.
Title: Half-pipe skiing
Content:  Half-pipe skiing is considered to be a dangerous sport compared to other forms of skiing. In January 2012, Sarah Burke died due to injuries suffered during a training accident. Helmets are required during competition, and there are airbags on the sides of pipes during practice runs. Colorado governor Bill Owens signed a law which protected ski-resorts from injury-related lawsuits. As the halfpipe in both skiing and snowboarding has begun more popular, the tricks and maneuvers have become more complicated leading to higher risk of injuries. In addition, improved technique, equipment and training have improved the aerodynamics of the users flying abilities. This has led to faster and higher elevation tricks which has also increased the amount of injuries.

Question: when did skiing halfpipe become an olympic event?
Answer: 2014.