The stock image used by Joe to create the animated eagle above originated
from the below still image by Steve Breen's of the San Diego Union-Tribune:

The First Week
The San Diego Union-Tribune's coverage of the first week
following the Sept. 11 World Trade Center and Pentagon attacks.
THURSDAY, SEPT. 13

Union-Tribune editorial cartoonist
Steve Breen's image of an eagle
sharpening its claws.