Before it was headquartered in Texas, American Airlines was headquartered at 633 Third Avenue in the Murray Hill area of Midtown Manhattan, New York City.[55][56] In 1979, American moved its headquarters to a site at Dallas/Fort Worth International Airport, which affected up to 1,300 jobs. Mayor of New York City Ed Koch described the move as a "betrayal" of New York City.[57] American moved to two leased office buildings in Grand Prairie, Texas.[58] On January 17, 1983, the airline finished moving into a $150 million ($369,000,000 when adjusted for inflation), 550,000-square-foot (51,000 m2) facility in Fort Worth; $147 million (about $361,000,000 when adjusted for inflation) in Dallas/Fort Worth International Airport bonds financed the headquarters. The airline began leasing the facility from the airport, which owns the facility.[58]
Airbnb was able to complete its entire database migration to Amazon RDS with only 15 minutes of downtime. This quick transition was very important to the fast-growing Airbnb because it did not want its community of users to be shut out of its marketplace for an extended period of time. Tobi Knaup, an engineer at Airbnb says, “Because of AWS, there has always been an easy answer (in terms of time required and cost) to scale our site.”
Phoenix–Sky Harbor – The sixth-largest hub in terms of number of flights and destinations[18] and American's primary western hub.[19] American flies approximately 20 million passengers a year through PHX, which is about 55,000 people per day.[19] Currently American has about 46% of the market share at PHX, making it the airport's largest airline.[19]

In November 2012, Airbnb acquired NabeWise, a city guide that aggregates curated information for specified locations.[57] The acquisition shifted the company focus toward offering hyperlocal recommendations to travelers.[58] That same month, Airbnb launched "Neighborhoods", a travel guide of 23 cities that provides in-depth information via collaborative filtering to help travelers choose a neighborhood in which to stay based on criteria such as public transportation, dining, peace & quiet, nightlife, tourist attractions, and shopping.[59][60][61][62][63]
Some cities have restrictions on subletting for a short period of time. Airbnb has published a list of regulations and requirements for cities in the United States. In some cities, collection of a transient occupancy tax by Airbnb is required. In many cities, hosts must register with the government and obtain a permit or license.[9] Landlords or community associations may have restrictions on short-term sublets.
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