Debris is seen at the scene where people died and were injured in Seoul, South Korea, Sunday, Oct. 30, 2022. after a mass of mostly young people celebrating Halloween festivities became trapped and crushed as the crowd surged into a narrow alley. (AP Photo/Ahn Young-joon) World leaders expressed sadness and condolences after at least 151 people were killed in a crowd surge Saturday night in Seoul, South Korea. The tragedy occurred in Seoul’s Itaewon district during Halloween festivities when a huge crowd surged into a narrow downhill alley. At least 82 others were injured in the South Korea’s deadliest accident...