SEOUL, Aug. 15 (UPI) -- South Korean President Yoon Suk Yeol on Thursday outlined a vision for unification with North Korea and offered to open a working group for dialogue, even as tensions with Pyongyang remain precariously high. Yoon laid out his plan in an address marking South Korea's Liberation Day, which celebrates the 1945 end of Japan's colonial rule, saying that "complete liberation remains an unfinished task for us." Advertisement "The freedom we enjoy must be extended to the frozen