A poster depicting a nuclear missile attack against the United States was still on display at a North Korean factory last month, a state TV program showed Wednesday, a rare indication that anti-U.S. education remains active in the DPRK’s carefully controlled state propaganda.

Authorities appeared to remove most anti-U.S. propaganda from public places and factories in 2018 as relations warmed with Washington, possibly as a friendly gesture, but evidence has emerged since then that shows their efforts were not thorough and that the underlying education has not gone away.

The latest confirmation of