can perform a 15/0 takeoff, where the leading edge slats are adjusted to 15 degrees and the flaps kept retracted. This takeoff technique is only used at hot and high airports, for it enables a higher climb limit weight and improves second segment climb performance. Most jetliner manufacturers have dropped the "hot and high" variants from their model lineups. Hot and high airports Notable examples of hot and high airports include: Addis Ababa, Ethiopia – Bole Airport Albuquerque, New Mexico, United States - Albuquerque International Sunport, especially from late spring to early autumn Brasília, Brazil – Brasília Airport Bogotá, Colombia – El Dorado Airport Calgary, Alberta, Canada – Calgary International Airport, especially from late spring to early autumn Daocheng County, Sichuan, China - Daocheng Yading Airport; At 4,411 m (14,472 ft) above sea level, Daocheng Yading is the highest civilian airport in the world. Daulat Beg Oldi, Ladakh, India - Daulat Beg Oldi Advanced Landing Ground (The world's highest airstrip at . Climate ranges from a maximum of in summer to in winter ) Denver, Colorado – Denver International Airport, especially from late spring to early autumn Edwards Air Force Base, California, United States Guatemala City, Guatemala - La Aurora International Airport, the highest international airport in Central America (). It is hot from late February to late October Harare, Zimbabwe – Robert Gabriel Mugabe International Airport Jangdam Township in Shigatse, Tibet, China - Shigatse Peace Airport; Elevation: 3,782 m (12,408 ft) Johannesburg, South Africa – O. R. Tambo International Airport Kabul, Afghanistan – Kabul International Airport Kampala, Uganda - Entebbe International Airport Kangding, Sichuan, China - Kangding Airport; Elevation: 4,280 m (14,042 ft) Kunming, Yunnan, China - Kunming Changshui International Airport Kuwait City, Kuwait - Kuwait International Airport (while only at an elevation of , it is widely considered one of the world's hottest airports, as temperatures can reach up to on an average summer day) La Paz, Bolivia – El Alto International Airport (not generally a "hot" airport, as average high temperatures are never more than throughout the year, but the world's highest commercial airport with regularly scheduled international flights at ) Las Vegas, Nevada, United States – Harry Reid International Airport Leh, Ladakh, India - Kushok Bakula Rimpochee Airport - (One of the highest commercial airports in the world at . Surrounded by high mountain peaks and with temperatures ranging from −42 °C (-43.6 °F) in winter