What's wrong with this picture?
Answer:
It shows Marines in a mosque in Falloujah, wearing combat boots.
(Of course they're wearing combat boots, dummy! They're Marines, and they're in combat.)
Right. But, equally of course, one does not enter a mosque with shod feet. Or, if it's necessary to do so, it's considered polite to leave the photographers outside.
The picture, which occupied about 2/3 of the space above the fold in today's Los Angeles Times, should make an excellent al Qaeda recruiting poster.