It's October 2008: major banks are failing, Congress is bailing them out with taxpayer dollars. The public deserves to know how we got into the mess. ABC News Nightline's "Inside the Collapse" was first to expose a top-down, company-wide reckless lending strategy that led to the biggest bank failure in U.S. history: Washington Mutual Bank. Senior Justice Correspondent Pierre Thomas got inside Washington Mutual's culture and uncovered what really went wrong using original reporting, an exclusive whistleblower interview, a video of a jubilant company party, exclusive internal company documents, former employee interviews and victim interviews. His piece, as well as a follow-up on World news with Charles Gibson and articles on ABCNews.com, caught the attention of law enforcement. Two days after the piece aired, federal prosecutors announced that because of "intense public interest" they were investigating the bank's activities with assistance from the FBI, FDIC, SEC and IRS. The story was widely reported in the national media in the following weeks.