Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Tweet with a location 
  
 You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more ||||| A passenger walks by an American Airlines airplane at a gate at the O'Hare Airport in Chicago, Illinois October 2, 2014. 
  
 American Airlines (AAL.O) on Thursday said it was working to get customers in the air after technical problems caused it to halt flights to three of its hub airports. 
  
 American, the world's largest airline, experienced hundreds of delays as it stopped takeoffs to Dallas-Fort Worth, Chicago O'Hare and Miami international airports for nearly two hours. 
  
 The carrier has fixed the technical problems, which it characterized as "connectivity issues," that started at noon ET, a company spokesman said. International flights and service on subsidiary US Airways were not affected. 
  
 Some 525 flights on American Airlines were delayed and five canceled on Thursday, according to flight-tracking website FlightAware.com. 
  
 The flight groundings follow several high-profile computer problems that U.S. airlines have faced in recent months. Industry consultants say the impact of computer disruptions will keep growing as airlines automate an increasing chunk of operations, outfit their planes with Wifi and distribute boarding passes on smartphones. 
  
 In April, American Airlines delayed flights when an iPad application used by pilots to view airport maps malfunctioned. 
  
 Rival United Airlines (UAL.N) in June halted flights when it discovered a problem arising from its dispatch software. And in July a router error locked United out of its reservations records and therefore blocked check-in and boarding. 
  
 American's stock was up 2.7 percent at $44.22 in afternoon trading on the Nasdaq. 
  
 (Reporting by Jeffrey Dastin and Lisa Lambert; Editing by Andrew Hay and Marguerita Choy) ||||| DALLAS (AP) — American Airlines says it has fixed a technology problem that was grounding flights to and from Dallas, Chicago and Miami on Thursday. 
  
 American spokesman Casey Norton said the airline did not immediately know the cause of the outage, which began around 11 a.m. CDT and lasted nearly two hours. 
  
 Flights on both American and its regional affiliate, American Eagle, were halted. 
  
 The Federal Aviation Administration said that American Airlines planes destined for Dallas-Fort Worth International Airport, O'Hare Airport in Chicago and Miami International Airport were held on the ground during the outage. 
  
 American did not immediately say how many flights were affected. 
  
 The outage comes at an awkward time for American Airline Group Inc., the world's biggest airline. In a month, the company plans to complete combining the reservations systems of American and its US Airways subsidiary and retiring the US Airways brand. 
  
 Combining technology systems is a difficult feat that has tripped up other airlines, notably leading to several outages at United Airlines after it merged with Continental Airlines in 2010. United suffered two major outages this summer. 
  
 American has made meticulous plans to avoid a similar fate. Among other moves, it will reduce flights to lighten the load on its network while it combines the two reservations systems. ||||| American Airlines resumed flights Thursday after computer problems briefly grounded flights at three of its busiest airports. 
  
 The problem affected flights to and from Chicago's O'Hare Airport, as well as Dallas-Fort Worth and Miami. Almost 300 flights were delayed due to the problem, which represents nearly 20% of the daily departures for the world's largest airline. 
  
 The ground stop started around 12:41 p.m. ET, according to the FAA. American said in a statement at 2:42 p.m. that its "connectivity issues" had been resolved. 
  
 "We apologize for the inconvenience and are working to get our customers on their way as soon as possible," an American (AAL) spokesman told CNN. 
  
 American said it has no reason to believe that this is related to hacking. However, its IT team is still trying to figure out a definitive cause. 
  
 Problems with computer systems grounding flights are not uncommon. 
  
 United Airlines (UAL) suffered a grounding in March that lasted less than an hour. 
  
 But these kinds of technical problems have a way of rippling through an airline's schedule, causing problems that can take hours or even days to resolve fully, particularly when it hits three major hubs like O'Hare, DFW and Miami. 
  
 Airline schedules are very tight, which makes restoring normal operations and rebooking affected passenger costly and time consuming, said James Record, a professor of aviation at Dowling College, at the time of the United glitch. 
  
 Even flights that were able to land as planned at affected airports can be delayed if there isn't a gate available to unload passengers. That can cause many passengers to miss connections. 
  
 American had to ground about 75 flights over two days this past April due to problems with an iPad app used by pilots. American pilots now get their flight plans and other technical information over company-issued Apple (AAPL, Tech30) iPads. |||||
A:
Just a few days ago, American Airlines confessed it had mistakenly allowed an aircraft not certified for long flights over water to make the trip from LA to Hawaii. Today the airline faces another problem: Unexplained technical issues forced it to temporarily ground planes at three of the country's most hectic airports, CNN reports. Chicago's O'Hare, Dallas/Fort Worth International Airport, and Miami International Airport were all affected during the two-hour glitch, which ended about 2pm Eastern, reports AP. The FAA notes in a tweet that the stoppage was due to a "computer issue." International flights weren't affected, a spokesman tells Reuters.