US Airways American Customer Satisfaction Index by the University of Michigan, US Airways ranked last in customer satisfaction among the major airlines. However, it was making steady ground to bridge its gap with other airlines. In late 2008, US Airways closed its Las Vegas hub, which was part of the America West network. On January 15, 2009, US Airways Flight 1549, under the command of Captain Chesley Sullenberger, flying from New York City's LaGuardia Airport to Charlotte Douglas International Airport, ditched into the Hudson River shortly after takeoff. Multiple bird hits from a flock of Canada geese caused both engines to lose
Flock (birds) to find a reliable food source will alert the flock and the entire group may benefit by this finding. While this is an obvious benefit of the information-sharing model, the cost is that the social hierarchy of the flock may result in subordinate birds being denied food by those that are dominant. Another cost is the possibility that some individuals may refuse to contribute in the search of food and instead simply wait for another member to find a food resource. These individuals are known as producers and scroungers, respectively. An intricate hunting system can be seen in the Harris's