Hi Res pics of Fukushima indicate conventional explosive

There are new high resolution pics of the Fukushima reactor damage showing a big hole in the top of the reactor containment concrete shell:

[link to lucaswhitefieldhixson.com]

and on www.rense.com the headline story is

Busby - Fukushima #3 Blast (MOX) Was A Nuclear Explosion

[link to www.youtube.com]

conspiracy theorists are saying it wasn't a hydrogen explosion (true) and that it was a nuclear explosion (maybe)

if it was a nuclear explosion then why is the building still there??? even a low yield nuclear explosion would have vaporized the entire building

what it could be is sabotage by conventional explosives and just like 911, the earthquake/tsunami is the cover story