I don't think they have any idea how foolish they look to the thousands of people who walk by them every day to pay their respects.
But we know they don't - missiles inside holograms, that's what they want investigated.
When the actual truth, which bin Laden is reinforcing himself and which every other rational person already understands, becomes undeniable to even them, the "Truthers", will they hang their heads in embarrassment? Will they quickly try to hide their XXL "Investigate 9-11" t-shirts?
I'll be watching - with popcorn.