A new poll shows that 64 percent of Americans no longer believe the war in Afghanistan is worth fighting. Yesterday, US Senators paid little attention to General David Petraeus' first public report since he took command last year, and he'll talk to a House counterpart today. News coverage has been minimal and he's unlikely to make a dent in public opinion, which has turned against the longest war in US history. But despite all the competing events from Japan to North Africa to Capitol Hill, 98,000 American soldiers are still on the ground. Have the goals of the war changed since September 11? Can it be won? How many troops should come home? How soon?