Green berets reportedly are talking to Afghan villagers after the alleged killings of at least 16 people, including nine children, by an American soldier. The Taliban has threatened reprisals, and tensions are very high, with President Karzai calling the incident "unforgiveable." In the US, a recent poll shows 60 percent find the war no longer worth fighting, but political leaders are divided. We hear from Kabul and Washington. Can trust be restored? Is the withdrawal strategy likely to change?