Neither James or Lily had their wands on ther person at the time . Plus apparation is pretty dangerous , even if you do it a lot . You need to concentrate pretty hard and think of a destination . You can still splinch pretty easily . So doing that in a stressful situation with a baby can be pretty dangerous . <| sep |> The CIA with the american government were behind the warning to the Germans to stop the deal . They do have a say in the matter as the governments listen to each others warnings . Also Aixtron like many translatlantic companies has bought out a lot of companies in the US and other parts of Europe . Im guessing sensitive technology could have been in one of those subsidiaries , maybe why it wasn ' t readily apparent to the German government . For example one of the UK ones they bought deals with nanomaterials which is important in some high tech military technology .