This Takes Place in Chapter 5-4: Commando Base, You have to cross an area with a bunch of enemies, then you get some air support. He tells you his name is Frank! You easliey defeat all the enemies, then you go into the temple entrance and frank helps you out again. Then one of the guys comes up and blows frank out of the sky. Leon yells out to Frank "Mike, NO!!!" If you walk up to the edge of where Frank dies, Leon will say that he will avenge Mikes Death. Also in the strategy guide it says Mike. I have watched it several times just to be sure that I heard it right, and you will too!