The Pentagon has failed to maintain a complete database of generals and other high-ranking officials who consider joining defense contracting firms after leaving the military. The database was required under a 2008 law passed by Congress because of concerns about a revolving door" between the Defense Department and private industry. Despite that mandate, the Pentagon's database remains "of marginal value," according to [a] report released by the Defense Department's Office of Inspector General, which concludes that the Pentagon "may not have fully complied with the intent of this law." The report marks the second time that the IG has raised questions about compliance. In 2008, the Government Accountability Office found that 52 of the biggest defense contractors employed 2,435 former generals, senior executives and acquisition officers. Of those, 422 were in a position to work on defense contracts directly related to their former agencies and at least nine may have been working on the same contracts they previously oversaw. Top Pentagon officials involved in procurements that exceed $10 million are required to seek an ethics opinion from government attorneys before going to work for a defense contractor. Under the 2008 law, the Pentagon is supposed to keep those opinions for five years in a central database. Investigators found that some agencies were not uploading requests for ethics advice to the database. And a review of what was in the system revealed all sorts of problems.