
Detonation of entrance to tunnel 2 and the observation building next to it. Photos by CNN Beijing bureau chief Tim Schwarz

The deputy director of the North Korean Nuclear Weapons Institute briefs reporters before the demolitions begin.

A close-up of a soldier standing guard in front of an observation building at tunnel 2.

A soldier stands guard in front of the soon to be demolished observation building of tunnel 2.

Detonation of entrance to tunnel 2 and the observation building next to it.

Detonation of entrance to tunnel 2 and the observation building next to it.

Journalists are taken to inspect the aftermath of the explosion at the mouth of tunnel 2.

Journalists take photographs at the entrance to tunnel 3.

A soldier stands at the entrance to tunnel 3.

A view inside tunnel 3.

The entrance to tunnel 4, an unused tunnel that North Koreans say was ready to conduct advanced nuclear weapons tests.

A close-up of explosives rigged at the entrance to tunnel 4, an unused tunnel.

Explosive charges were placed back as far as the eye could see in tunnel 4.



