Planted. Iraqis don't grow to be 80 by remaining in crossfire reading instead of running (or wheeling) for cover.
That's my guess. Either that or used as a shield.
One Haditha victim was an elderly man, close to 80 years old, killed in his wheelchair as he appeared to be holding a Koran,Wonder if they shot him before or after they flushed the Koran down the toilet?