I haven't walked out on many movies, but this one was wasting my time and my bottom hurt about a half-four before the scheduled ending.
I was looking forward to the all-star cast which did give a great performance but this blockbuster promised special effects that in reality were old and tired.
If you like the made for tv specials like the Towering Inferno, then you might enjoy this film. When the screen transformed into an image of ash falling from the sky in a recreation of 9-11, I had enough and walked out.
Save your money and your seat and watch this at home where you are not subject to the 25 minutes of previews included in the extra long run-time.