it looked out then, as it does today, over the plain of tipperary, called the golden vale because its rich soil makes it ireland's best farmland. on this historic rock, you stroll among these ruins in the footsteps of st. patrick, and wandering through my favorite celtic cross graveyard, i feel the soul of ireland. >>> funding for "overhead" with evan smith is provided in part by m.f.i. foundation, improving the quality of life within our community. and from the texas board of legal specialization, board certified attorneys in your community. experienced, respected, and tested. also by hillco partners, a texas government affairs consultancy. and by the alice kleberg reynolds foundation. and viewers like you. thank you. >> i'm evan smith. he's an acclaimed documentary filmmaker whose credits include "enron: the smartest guys in the room." "we steal secrets: the story of wikileaks." "the armstrong lie." "client 9: the rise and fall of eliot spitzer," and "taxi to the dark side," which won the academy award in 2007. his latest film is "going clear: scientology and the prison of belief."