Tillerson opens summit with a vow to keep up pressure on North Korea

VANCOUVER, British Columbia - Secretary of State Rex Tillerson said Tuesday that the United States would not stop joint military exercises with South Korea in exchange for North Korea freezing its nuclear weapons program, and he promised to keep squeezing Pyongyang economically and diplomatically until it abandons its quest.
"We must increase the costs of the regime's behavior to the point that North Korea comes to the table for credible negotiations," Tillerson said at the opening of a summit o