Thunderbolts #143 (2006)

SIEGE BLOCKBUSTER TIE-IN!!
Round three of Thunderbolts vs. The Mighty Avengers! Here at the end of SIEGE, everything set in motion by Norman Osborn comes to a fiery resolution-like his prime black-ops force!
It's the cataclysmic end of an era - that sets the stage for the next big chapter of the most unpredictable book ever!