Berlin remained the last open crossing within the increasingly militarised and airtight "inner-German" border. On thirteen August 1961, the East German (GDR) Management shut the border just weeks right after East German chief Walter Ulbricht mentioned inside a push convention "Niemand hat die Absicht eine Mauer zu errichten" (no one https://bbcnewsz.de/rum-tasting-berlin-ein-erlebnis-fur-genieser/