estimate that the North has enough uranium for as many as six or seven nuclear bombs.
And they are continuing to enrich more materials at Yongbyon, their main nuclear facility. Other sites could be as well, but aren't confirmed.
Concerns and tensions are heightened right now, due to an attempted rocket launch two weeks ago, and the increased amount of threats, against the South, coming from the North.
Much of the world also suspects them of preparing to make an underground test, within the next two months.