remember, this was an army that the united states had spent more than $25 billion building up, an army more than 200,000 strong. that's more than six times the size of isis and maybe more. and it was all rendered useless against the isis assault. why? well, much of it can be pinned on one man. >> if you ask me, what's the most important factor of iraq, driver behind the resurgence of isis? i would say nuri al maliki. >> nuri al maliki, the iraqi prime minister, whom the bush administration had helped put into power in 2006. >> i appreciate your commitment to representing the people of iraq. >> back then, maliki's appointment was touted by the administration as a triumphant moment for the newly democratic iraq. >> i appreciate you recognize the fact that the future of your country is in your hands.