North Korea has put a question mark on the June 12 summit between Kim Jong Un and US president Donald Trump. The North's official Korean Central News Agency (KCNA) on May 16 also said in a statement that Pyongyang had suspended high-level talks with South Korea. The reason for North's action are the ongoing military exercises between Seoul and Washington that Pyongyang has long claimed are invasion rehearsals. A senior North Korean diplomat has also said his country will refuse to be pressured into abandoning its nukes. North Korean leader Kim Jong Un is scheduled to meet Trump in Singapore on June 12. How have South Korea and the US reacted to the North's threat? What's the likely fate now of the Kim-Trump summit?