Why would the Americans do this?:
- To provide the illusion of an extra bit of high tech American prowess to sell this fairy tale to the American people;
- To create some confusion about the state of American military capabilities; and
- To provide some protection for Pakistani officials by explaining how the helicopters weren't detected by Pakistani radar (presumably this was the Pakistani price for going along with this charade).
The internet is still crackling with wild speculations about the technological meaning behind every detail of the photos, with nary a skeptical word.