Pics of latest explosion on BBC. It's still all speculation as to what caused the explosion and whether it weakened the containment or not.
http://www.bbc.co.uk/news/world-asia-pacific-12720219
Also a video with Melbourne nuclear expert on Al Jazeera about half way down this page:
http://english.aljazeera.net/news/asia-pacific/2011/03/20113124353222667.html
