North Korean trash balloons hit the South Korean President’s compound.

Weeks into North Korea’s campaign of releasing trash-filled balloons across the world’s most highly militarized border, some of them struck a symbolic target in South Korea on Wednesday: the presidential office in the heart of Seoul, the capital. Since May, North Korea has released over 3,000 trash balloons, many of which have landed in South Korea after drifting across the Demilitarized Zone. So far, they’ve been a bother but no threat. They have landed on trees, farms, and urban side streets, pouring garbage such as paper, cloth, cigarette butts, and compost.