North Korea on Sunday condemned the U.S. administration for stepping up sanctions and pressure on the nuclear-armed country, warning of a return to “exchanges of fire” and that disarming Pyongyang could be blocked forever. The North’s stinging response came after the United States said on Monday it had introduced sanctions on three North Korean officials, including a top aide to North Korean leader Kim Jong Un, for alleged human rights abuses. Denuclearizing North Korea has made little progress since Kim Jong Un and U.S. President Donald Trump met in Singapore in June in a historic summit. The two sides have yet to ... (full story)