How do you talk to butch in Fallout 3?

the bar on the lowest deck of rivet city; but you have to have let him live when you break out of 101 and then complete the quest 'trouble on the homefront' which shows up after your dad dies at project purity (go to megaton and look for the radio vault 101 emergency broadcast) and somehow get the overseer to let the residents of 101 come and go. you either have to pass a speech check (i think this only works if the 1st overseer lives) killing the overseer, or providing evidence of a impending coup by vault security in the little jail-room on the terminal.

in short: hes in the muddy rudder after completing the quest trouble on the homefront in favor of the rebels.