A man walks behind camels at the Birqash Camel Market, ahead of Eid al-Adha or Festival of Sacrifice, on the outskirts of Cairo September 29, 2014. Birqash Camel Market, one of the biggest markets for camel meat in Africa, draws sellers from Libya, Sudan, Somalia and other regions in Egypt. The camels sold at the market are also used in tourism. Traders say that the selling rate for a camel in 2014 is anywhere between 5,000 and 20,000 Egyptian pounds (700 – 2800 USD). (Photo by Amr Abdallah Dalsh/Reuters)

Heavy equipment works along the still under construction Bamiyan-Yakawlang road June 10, 2011 in Yakawlang, Afghanistan. The 69 Million US$ project is supported by the Government of Japan and World Bank. The 90K road project was started three years ago and is slated to be finished within another year. This new road means faster travel from Bamiyan to Afghanistan's only national park, Band-e-Amir. This is in of the safest parts of the country and the hope is to expand tourism in the region. (Photo by Paula Bronstein/Getty Images)

Dancers from the Yarrabah community perform during the Laura Aboriginal Dance Festival on June 18, 2011 in Laura, Australia. The Laura Aboriginal Dance Festival is a celebration of aboriginal dance and culture that takes place Biennially in Cape York Peninsula at the site of a traditional Bora ground that is sacred to the aboriginal community and surrounded by some of the oldest rock art in the world. Over 5000 visitors attend the festival, offering a unique insight into the community and providing an opportunity to spread cultural traditions to new generations. The festival takes place June 17-19. (Photo by Mark Kolbe/Getty Images for Tourism Queensland)

In this picture taken Friday, September 8, 2017, Brazilan Samba dancers perform on stage during the Harare International Carnival in the capital. An international carnival aimed at boosting the local tourism industry has ended in economically troubled Zimbabwe. Some viewed the Harare festivities, which ended Sunday and featured artists and dancers from Brazil, Cuba, Egypt and elsewhere, as a relief from the struggle to get by in the southern African country. (Photo by Tsvangirayi Mukwazhi/AP Photo)

An Indonesian model wearing a colorful costume participates in a parade during the Batam Island International Culture Festival in Batam Island, Indonesia, 16 December 2017. Batam Island, an industrial area in Indonesia, is boosting the tourism sector to improve the economy of its community by eyeing the visitors' boom of next door country Singapore. (Photo by Hotli Simanjuntak/EPA/EFE)

In this photo taken Monday, April 29, 2013, carver Jackson Mbatha, 40, poses next to a an unfinished large toy giraffe he is making from pieces of discarded flip-flops, in front of a painted workshop wall at the Ocean Sole flip-flop recycling company in Nairobi, Kenya. The company is cleaning the East African country's beaches of used, washed-up flip-flops and the dirty pieces of rubber that were once cruising the Indian Ocean's currents are now being turned into colorful handmade giraffes, elephants and other toy animals. (Ben Curtis/AP Photo)

Number 10. BELL H-13 SIOUX was a two-bladed, single engine, light helicopter built by Bell Helicopter. Westland Aircraft manufactured the Sioux under license for the British military as the Sioux AH.1 and HT. In 1947, the United States Air Force ordered the improved Bell Model 47A. Most were designated YR-13 and three winterized versions were designated YR-13A. The United States Army first ordered Bell 47s in 1948 under the designation H-13. These would later receive the name Sioux. The Bell-built H-13 B is seen airborne in this April 29, 1951 photo. The helicopter is equipped with a 173 horsepower engine, cruises at 85 miles per hour, climbs 900 feet in a minute and has a service ceiling of 11,500 feet. (Photo by AP Photo)

Members of a samba school warm up before parading along Copacabana Beach in Rio de Janeiro, Brazil, Saturday, January 6, 2018. Musicians and members from Rio de Janeiro's top 13 samba schools have paraded in an event aimed at promoting tourism ahead of Rio's world famous Carnival that begins early next month. (Photo by Leo Correa/AP Photo)