== Precursor Context == 

  You added a good section, but why not simply call it "background" ? 

 I think this would be a better yet structure: 
 *Background 
 *Immediate events (missing)  
 :This section would have to be made out of content currently in the lead, but then the question is what should remain in the lead. 
 *Investigations 
 *Reports 
 *Reactions