In 2003, with another Alaska Airlines captain, named Hal Andersen, and high-tech entrepreneur Dan Gerrity, Fulton founded Naverus to develop RNP approaches for other airports in difficult terrain. They won contracts in Brazil, Canada, Australia, New Zealand and the U.S. But they were determined to make inroads in China. When I first met the Naverus people, in Beijing in 2007, they had just completed one historic project and were preparing for another. The achievement just behind them was an approach to what was then one of the highest and most difficult airports anywhere on Earth: Linzhi, in Tibet. Linzhi's runway was at 9,670 feet of elevation, about the same as the highest airport in North America, in Leadville, Colorado. But Leadville is a tiny ex-mining settlement of perhaps 2,000 people, while Linzhi is a major conurbation of the Tibetan plateau. For about 300 days of the year it rains in Linzhi, and the rest of the time the weather is still rarely good enough to land under Visual Flight Rules, or VFR, which require enough visibility that pilots can find their way without instrument guidance through the 18,000- to 20,000-foot escarpments alongside the narrow valley in which Linzhi sits.