>> billy eli was the front man who brought stack into the band. he says the joe stack who flew his plane into a building was not the same joe stack he knew. some people call him a domestic terrorist. >> well, some people do. and some people call him all kind of things, man. i called him a friend of mine and my bass player. you know. i mean, i wasn't aware of any political agenda that he ever had. >> austin's a town known for big texas hospitality. ♪ vibrant music. and a thriving technology community. joe stack came here to start over. back in the '80s, stack founded a small company in california and connected with a group of people obsessed with taking on the u.s. tax code. for joe stack, this was the beginning of decades struggling with the tax system. j.j. mcnabb is an expert on tax protesters. >> their beef is somewhat varied but in general, they don't want to pay taxes. then they come up with a variety of reasons how not to do that. >> when stack's marriage and business went bust in california, he moved to austin. here he founded a software co