North Korean leader Kim Jong Un inspected a facility that produces nuclear material and called for bolstering the country's nuclear fighting capability, state media reported Wednesday, as the North looks to increase pressure on the United States following the inauguration of President Donald Trump.

Kim's visit suggests a continued emphasis on an expansion of North Korea's nuclear arsenal, though Trump has said he's willing to talk to Kim again to revive diplomacy. Many analysts view North Korean weapons moves as part of a strategy to win sanctions relief and political concessions from the United States.