SEOUL -- Tickets for North Korea's 2026 Pyongyang International Marathon, set for April 5 in the country's capital, have sold out just a few hours after sales opened, a Beijing-based tour agency said Tuesday.Koryo Tours, which specializes in travel to North Korea, broke the news on its social media account, saying, "After less than 5 hours the Pyongyang Marathon trips sold out completely, 500 spots on the trips are now all taken."The agency said it is working to open additional spots for the trip and urged readers to join a waiting list.The tour agency's website earlier announced that next…READ FULL ARTICLE