This week as North Korea continued to test new ballistic missile technology, a new president took charge in South Korea promising to take a harder line with the north. Yoon Suk-yeol used his inaugural speech to call on Kim Jong-un to pursue a genuine path to rid his country of nuclear weapons. If he does, Mr Yoon promised he'd present an "audacious plan" to boost the impoverished North’s economy. Meanwhile in Japan, former Prime Minister Shinzo Abe is calling for his country to re-think its post-WW2 ban on nuclear weapons. As the only nation to have suffered a nuclear attack, public opinion strongly supports laws prohibiting nuclear weapons on Japanese soil. But some analysts now believe the increased military threat from North Korea and China - including the testing of hypersonic missiles that in theory will be harder to intercept - mean that not only should Japan begin permanently hosting American nuclear warheads, it should even consider developing an nuclear deterrent of its own.

Ritula Shah is joined by a panel of expert guests.