I've been having fun with using flight tracking software to track flights, especially those that are in my local airspace over Wisconsin. Last night I was outside and saw a widebody at about 12,000 feet..it looked like a 777 to me but it was dark so hard to tell. So I went on the computer and saw that it was AA153 headed for ORD. This flight operates ORD-NRT...it isa AA154 that comes back to ORD, and lands in the morning..this was 11pm CST. The flight tracker said that it had departed ORD at 11:16am, and arrived ORD 11:25pm. Then at AA.com I noticed that the flight had been cancelled. I also compared the info on many other flight tracking websites and they were all the same...departed ORD...arrived ORD...any thoughts on what happened to this flight? Why was it showing that it took off out of ORD, only to land at ORD 12 hours later?