South Korea has expressed concerns over a variety of weapons systems that were shown to a foreign audience for the first time in a military parade to mark the 75th anniversary of the founding of North Korea’s ruling Workers’ Party of Korea on Saturday, as Seoul urged the resumption of intra-Korean talks. Al Jazeera reports that among the displayed weapons, one is what appeared to be an intercontinental ballistic missile that is larger than any of North Korea’s known ICBMs, and the other would likely be an upgraded version of a missile that can be fired from submarines. While some experts say they could be mock-ups of missiles under development, their disclosure suggests Pyongyang has been continuously pushing to boost its weapons capability amid an impasse in nuclear diplomacy with the United States.