This photo provided by South Korea's Joint Chiefs of Staff and released by South Korea Defense Ministry, shows a balloon presumably sent by North Korea, on the Han River in Seoul, South Korea, Sunday, June 9, 2024. North Korea flew hundreds of trash-carrying balloons to South Korea again in its third such campaign since late May, the South’s military said, just days after South Korean activists floated their own balloons to scatter propaganda leaflets in the North. (South Korea Joint Chiefs of Staff via AP)