The United States is weighing targeted sanctions against South Sudan due to the failure of leaders in the world's youngest nation to take steps to end a crisis that has brought the country to the brink of civil war, sources briefed on US discussions told Reuters. It's a tool that has been discussed, a source told Reuters on condition of anonymity about the possibility of US sanctions against those blocking peace efforts or fueling violence in South Sudan. Another source confirmed the remarks, though both declined to provide details on the precise measures under consideration. No decisions have been made yet, the sources added. Targeted sanctions focus on specific individuals, entities or...