Garry Wills ends his silence about the dinner that he and other well known American historians held with President Obama near the beginning of Obama's term. Wills reports that about one-half of the historians present expressed their concern about Afghanistan as a trap for the administration. Wills certainly shares this concern. This venture, which seemed so right to begin with, now presents us with a major problem. The crucial question: when will we know (if ever) that we have accomplished our mission?