coin was too smart to hang katniss... at least now.
"katniss, that's enough" coin says "you wouldn't want an accident would you? maybe a bomb, a crashing hovercraft, anything now would you?"
"you need me" katniss says "your people will rebel without me"
"your death will fuel nothing"
"only for a few days" katniss retorts. "until they figure it out. they always do'
"fine. ill kill you sister instead. or peeta. or gale. or all of them"