Diplomats and other observers in Libya say that with elections one month away, the National Transitional Council is struggling to exert control over various militia prominent in the uprising against Moammar Gadhafi. One source briefed by Western intelligence officials said that of particular concern is the city of Derna on the Mediterranean coast some 160 miles (260 kilometers) west of the Egyptian border. The source told CNN that hundreds of Islamist militants are in and around the town, and there are camps where weapons and physical training are provided to militants. He said one official had described the area as...