North Korean media on Thursday unveiled photographs of its new Hwasong-15 missile, showing DPRK leader Kim Jong Un watching the country’s latest intercontinental ballistic missile (ICBM) launch which took place a day earlier.

The new images show the successful launch of a large, two-stage ICBM and showcase new engine technology, suggesting North Korea has made rapid progress on its missile development.

“The ICBM has a new engine, but it may be something we have seen before,” Scott LaFoy, an NK Pro analyst and missile and satellite imagery expert said.

“It doesn’t use verniers (for steering) like the Hwasong-12 and -14, but it does