Expressing concerns over the expanding terror threat, US Joint Chiefs of Staff Chairman Admiral Mike Mullen has said Al-Qaeda is trying to get hold of nuclear weapons to wreak havoc across the world particularly in America. Speaking at the Junior Statesman Summer School Programme, Admiral Mullen said the leadership of both Al-Qaeda and the Taliban is desperately trying to acquire nukes to target Western countries. "Terrorist organisations, Al-Qaeda in particular, have been very open and direct about their desire to get a nuclear device and continue to terrorise people in accordance with their strategic approach, killing as many Americans and westerners as they possibly can with a device like that," Admiral Mullen said.