An Al Jazeera investigation has revealed that Palestinian leader Yasser Arafat may have been killed by radioactive poison. Medical and scientific tests at top laboratories found high levels of polonium in his body when he died. Now his widow, Suha Arafat wants to have his body exhumed to try and discover what killed him. Al Jazeera's Clayton Swisher reports. http://www.aljazeera.com/programmes/whatkilledarafat/2012/07/20127383653774794.html
