The United States said Tuesday that it is not hopeful that Syria will change its behavior, despite a UN Security Council resolution urging Syria to cooperate with an ongoing UN-sponsored investigation into the February assassination of Lebanese Prime Minister Rafiq el-Hariri. "We will wait to see what their reaction is. Initial indications are not too hopeful," said State Department spokesman Sean McCormack. Although McCormack said at this point the United States is not prejudging any other measures against Syria, the United States is encouraging Syria to cooperate. "But we are not holding our breath," said McCormack.