Science and technology

Associated Press
In this cell phone image, passengers are lined up at the American Airlines ticket counters at Chicago's O'Hare International Airport Tuesday, April 16, 2013. American Airlines says it has fixed an outage in its main reservations system that is disrupting travel for thousands of passengers whose flights have been delayed or canceled. Roughly 900 flights are directly impacted, according to flight tracking site FlightAware, with another 800 indirectly impacted due to planes and crew being out of place.  (AP Photo/Bob Brant)

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