London Guardian 
July 24, 2012
The credibility of the Olympic security operation being run by G4S is called into further question by claims that scores of trainees are being allowed to “cheat” their way through tests for the x-ray machines that detect homemade bombs and other weapons.
Trainees who fail the test are being given repeated opportunities to get the right answers to the same questions, and are also being allowed to confer with others during the exams under the noses of instructors, a source has told the Guardian.
Recruits are being given only 20 minutes’ practice on the real machines that will be used at the Olympic venues to stop visitors bringing in dangerous materials, or possibly an IED (improvised explosive device).
G4S insisted it has followed industry standards and that the tests were designed and approved by the Olympic organisers, Locog. It said it was not “uncommon or wrong” for trainees to repeat tests.