Iowa Senator Chuck Grassley has sent a letter to Attorney General Eric Holder reminding him that the Department of Justice has an obligation to inform Congress when Operation Fast and Furious weapons are found at crime scenes. Just last week, the Los Angeles Times reported Mexican Police Chief Luis Astorga and his body guard were killed by cartels using guns from the lethal operation. "Since the beginning of this investigation, we have followed the link between Fast and Furious weapons and crimes committed on both sides of the border. On numerous occasions we have asked the Department to keep us...