Good People:
I am looking for information about a proposal put forward by the German Imperial Navy to bomb NYC using the heigh climber Zeppelins. I have read about this here and on other websites but can't find any links to primary sources; i.e. Official documentation or even good secondary sources like official histories.
Actually, given my German, I would prefer a good secondary source- in English-that clearly states how we know the Germans were actually planning a raid.
Many thanks.
geo
geowalsh@ptd.net