Careful analysis of North Korean tests sites, using images from Planet, reveal the regime has gradually been building up the size of its missiles.
Scorch marks in the ground show that it may now be testing the Hwasong-12 rocket – capable of flying 4,500miles.
That would put the US military base at Guam, Hawaii and Alaska within range, reports Quartz.com.
The detailed satellite images are so precise that a private plane believed to whizz Kim around the country to watch missile tests is clearly visible.
And experts are not convinced a series of failed tests mean the programme is failing. The Sun