Violations occurring over a 4½ year period—from October 1993 to July 1998—targeted American Airlines for using high-sulfur fuel in motor vehicles at 10 major airports around the country. Under the federal Clean Air Act high sulfur fuel cannot be used in motor vehicles. American Airlines promptly identified and corrected these violations of the Clean Air Act.[79]
Founded in 1931 as American Airways, American Airlines (AA) is the world's largest airline when measured by revenue and fleet size. A founding member of the Oneworld alliance, AA operates a primary hub at Dallas Fort Worth International Airport (DFW) and has eight secondary hubs at airports across the United States. The airline flies to about 345 destinations in North America, the Caribbean, South America, Asia and Europe. It has codeshare agreements with 15 other carriers, as well as joint ventures with British Airways, Japan Airlines, Iberia, Finnair and Qantas on certain routes. Its fleet consists of 963 aircraft.
In 2011, due to a downturn in the airline industry, American Airlines' parent company AMR Corporation filed for bankruptcy protection. In 2013, American Airlines merged with US Airways but kept the American Airlines name, as it was the better recognized brand internationally; the combination of the two airlines resulted in the creation of the largest airline in the United States, and ultimately the world.[11]
Designers were also excited about the system. It enables product reviews to focus on the actual concepts and experiences of a design, rather than padding, colors and type choices. The DLS provides us with a shared understanding of our visual style, and streamlines contributions to a single system. This system also enables all of us to prototype and experiment with ideas in high fidelity faster and at a lower cost.

A study published in 2017 found that increasing Airbnb listings in a given neighborhood by 10% leads to a 0.42% increase in rents and a 0.76% increase in house prices.[141] According to an analysis conducted in 2016, while commercial listings comprised only 10% of Airbnb's total listings in 25 largest U. S. markets for the period between June 2015 and May 2016, they constituted about a third of host revenue. In markets such as Los Angeles and Portland, Oregon, the share of revenue from commercial listings reached nearly 50%.[142]

One year later, there were 15 people working from Chesky and Gebbia's loft apartment on Rausch Street in San Francisco. To make room for employees, Brian Chesky gave up his bedroom and lived at lodging booked via the Airbnb service until the company moved into its first office space.[32][18] In April 2009, the company received $600,000 in seed money from Sequoia Capital[18] and, in November 2010, raised $7.2 million in financing from Greylock Partners and, again, from Sequoia Capital, in a Series A round, then announcing that out of 700,000 nights booked, 80% had occurred in the previous six months.[33]