North Korea appears to be expanding its long-range missile base. CNN obtained the exclusive photos of construction taking place in mountains in northern Korea. Intelligence analysts say the missiles could carry nuclear weapons capable of reaching parts of the United States. President Donald Trump has been trying to convince North Korean leader Kim Jong Un to give up that nation's nuclear ambitions and is currently trying to set up a second meeting between the leaders early next year. The new construction is taking place just seven miles from an older site.