North Korea's invitation to South Korean President Moon Jae In to visit Pyongyang, which marked the climax of its Olympic charm offensive, puts him in the delicate position of needing to maintain the conciliatory mood on the Korean Peninsula while keeping intact his country's alliance with the United States.Whether or when Seoul and Washington will carry out annual joint military exercises that were delayed until after the Olympics and Paralympics is a looming challenge for the Moon administration, Korea experts say.(U.S.-South Korea live-fire drills in April 2017)North Korean leader Kim Jo…READ FULL ARTICLE