North Korean leader Kim Jong Un, right, arrives for the official opening of the Ryomyong residential area, a collection of more than a dozen apartment buildings, Thursday, April 13, 2017, in Pyongyang, North Korea. (AP Photo/Wong Maye-E)
N. Korea holds large-scale artillery drill amid tensions
03:54 - Source: CNN
CNN  — 

The world is anxiously waiting for North Korea’s sixth nuclear test.

More than a month after US and South Korean officials publicly declared North Korea was ready to set off a nuclear bomb and almost two weeks since analysts said North Korea’s only nuclear test site, Punggye-ri, was “primed and ready,” no detonation has happened.

With every nuclear or missile test, North Korea gets closer to its stated goal of developing a nuclear weapon that can be mounted on a missile capable of reaching the United States.

So what’s with the delay?

“I think it’s safe to say that they will conduct a sixth nuclear test at some point,” Jean Lee, a global fellow at Wilson Center and a lecturer on North Korean studies, told CNN. “But they do calibrate the timing very carefully and are really taking a number of factors into consideration.”

A US official told CNN Tuesday that the military had observed significant activity at North Korea’s Punggye-ri nuclear testing site, with a new digging effort at the tunnel entrance. The official said that this activity suggests a nuclear test is not imminent.