MDA_II: Please remember to post the link to the original article. Thank you for the post, it's quite informative.
Original source: http://www.theaviationnation.com/2008/04/30/tsa-is-failing-armed-pilots-on-psyche-test/
From their front page:
Air Marshals on No-Fly List
False identifications based on a terrorist no-fly list have for years prevented some federal air marshals from boarding flights they are assigned to protect, according to officials with the agency, which is finally taking steps to address the problem.Federal Air Marshals (FAMs) familiar with the situation say the mix-ups, in which marshals are mistaken for terrorism suspects who share the same names, have gone on for years — just as they have for thousands of members of the traveling public.
One air marshal said it has been "a major problem, where guys are denied boarding by the airline."