North Korea on Wednesday threatened to cancel the upcoming summit with the United States by denouncing Washington's call for its denuclearization, while suspending scheduled inter-Korean high-level talks over U.S.-South Korea military drills.The North's abrupt shift in rhetoric, coming as U.S. President Donald Trump has urged Pyongyang to give up all its nuclear weapons, may suggest North Korea is trying to test Washington in the run-up to the historic summit between Trump and North Korean leader Kim Jong Un, planned in Singapore on June 12."If the U.S. is trying to drive us into a corner t…READ FULL ARTICLE