Though it's not very often.
An awesome quote from Donald Rumsfeld, former Defense Secretary, on why American troops were not dispatched to stop the looting of Baghdad museums:
The images you are seeing on television you are seeing over, and over, and over, and it's the same picture of some person walking out of some building with a vase, and you see it 20 times, and you think, "My goodness, were there that many vases?" (Laughter.) "Is it possible that there were that many vases in the whole country?"
You're right, Donald. There is only room for 19 vases in Iraq.