After landing something went wrong... http://www.chicagotribune.com/news/nationworld/sns-ap-cb-guyana-plane-crash,0,3663559.story
It appears that breaking in two was secondary to running off the runway, crashing through a fence, etc. Odds are that this was pilot error -- landing too far down the runway or violating other minimums.
Amazing photos! Glad to see that everybody escaped the aircraft. I'm also relieved that it did not catch on fire, which happened with the AF bird in YYZ. http://www.chicagotribune.com/news/...-crash-guyana-pictures,0,6150172.photogallery