This photo provided by South Korea Defense Ministry, shows trash from a balloon presumably sent by North Korea, in Seoul, South Korea, Wednesday, May 29, 2024. In another sign of tensions between the war-divided rivals, South Korea's Joint Chiefs of Staff said North Korea also has been flying large numbers of balloons carrying trash toward the South since Tuesday night, in an apparent retaliation against South Korean activists for flying anti-Pyongyang propaganda leaflets across the border. (South Korea Presidential Office via AP)