Forty relatives of 9/11 victims are slamming the so-called independent investigation into the Sept. 11 attacks, saying that too many on the panel are using the probe to "grandstand for political gain" in a bid to damage President Bush in an election year. In an open letter released to the New York Post on Tuesday, the 9/11 relatives blamed the commission for fostering "the incredible notion" that President Bush knew 9/11 was coming and did nothing. "I see the commission going partisan and that's not the way it's supposed to be. If it does that, it will be nothing...