Deep inside a decommissioned nuclear bunker built into a Cologne subway station at the height of the Cold War, tour guide Robert Schwienbacher says he is getting a number of inquiries from Germans asking for space available in an emergency.
Concerns of Germans that dissipated with the fall of the Berlin Wall are now creeping back after decades of peace. It is a flashback for a nation that found itself at the geographic and political centre of the Cold War.
