I think the straight answer to that is that they are AMERICAN. The pilot unions there would not tollerate european pilots flying N registed planes internally (I guess we're not up to it). But this starts another argument with regard to them (Americans) flying european reg a/c ref Thomas Cook. If there where a level playing field I think Cargolux would got the whole contract. As it is at the moment Evergreen will be tapping into the experience that CLX has. Which probably explains why they have been brought on board as a contractor.