Here's a few freebie plot points to perk up your story:

Have the C5A let out a grappling hook, swoop down over the DuPont
factory, and grab a 100 ton roll of Nomex, the 10 yard wide roll kind.

Have the C5A do tight circles around the WTC and wrap the nomex around
one building, snuffing out the fires, then circle the other way and
wrap the other tower.

I'll settle for 2% of the boxoffice gross, or $1, whichever is greater.