US President Donald Trump alleged Sunday that nuclear-armed countries including Russia and China have conducted underground nuclear tests unknown to the public.
"Russia`s testing, and China`s testing, but they don`t talk about it," he said in an interview with CBS`s "60 Minutes" program, when asked about his surprise order on Thursday for the United States to test nuclear weapons.
"You don`t necessarily know where they`re testing... They test way underground where people don`t know exactly what`s happening with the test," he added.
