I seriously doubt that even assuming that the company did all their diligence (I'm not saying that they did not) that their success rate would be 100%.
The government outsources background checks for top-secret jobs? Why, so they can shift the blame for their 10%-rated efforts to private firmst?<p>Makes you wonder: who was responsible for picking USIS to do the job?
A wild scape-goat appears!<p>Good ol' distractionary (although OSX thinks I mean "discrattionary" for reasons I can't fathom) tactics.