The core business of the AT is ammunition from pre-inspection of items coming into service, routine surveilance, repair, storage and movement and then final disposal. In addition they also ensure that the Army stocks and storage at Unit level is safe and serviceable and will investigate all defects, performance failures and accidents involving ammunition. Added as a tack on is EOD/IEDD because someone thought that the best technical background to have when dealing with dangerous ammunition and explosives was an ordnance one. Was this right? There seems to be a natural selection occuring within the trade as to whether you end up going the EOD or Ammo route, depending on your flair for the EOD subject. Why is this? Is it purely down to the technical knowledge of the individual, the intellectual understanding of this knowledge, the ability to think "outside the box", the ability to apply an ordnance knowledge to an improvised situation or pure personality? Why do some people not get it? Do you really require an ordnance background to be able to be competent at EOD? What does it really bring to the party? Or do you just need to be able to spell your name correctly?