North Korea said Thursday it has "completely" dismantled its only known nuclear test site in Punggye-ri in the presence of foreign reporters as promised, hours before U.S. President Donald Trump abruptly called off next month's planned Washington-Pyongyang summit.It said in a statement that the demolition was conducted in such a manner as to "make all the tunnels of the test ground collapse by explosion and completely close the tunnel entrances."The foreign journalists who visited the Punggye-ri test site in the country's northeast reported that three underground tunnels, observation buildi…READ FULL ARTICLE