Cue the wailing: Iran has 5 kilos of 20% enriched uranium. I'm wondering if Iran still plans its nuclear summit meeting. It's going to look pretty weak after this week's Nuclear Security Summit. Although I suppose the media can make three guys meeting in a small room like an equivalent.
Russia has shut down its last plutonium production reactor. This is a big deal, because many of the Russian production reactors also produced electricity and hot water for their communities. So in order to shut down the reactors, new power plants had to be built.
Update: Video of the reactor shutdown (in Russian). (h/t IntelSecurity)
Crooked Timber continues the argument with libertarians.
Some great photos out there of the volcano in Iceland. Try here, here, and here.
Update: UK Met Office satellite photos of the ash cloud.