Last night, the messy background behind Sgt. Dakota Meyer’s Medal of Honor was reintroduced to the nation. In a 15-minute piece on “60 Minutes,” CBS reporter David Martin outlined what went wrong in the six-hour battle in Ganjgal, Afghanistan, that led to Meyer taking his life in his hands on Sept. 8, 2009, in an attempt to save as many Afghan and American forces as he could from the teeth of a well planned ambush. The clip is up here: [HTML1] Some of the details reported last night will be common knowledge to those who have tracked Ganjgal, but there…