War torn

A strange meeting took place in 1941: Werner Heisenberg, the German
physicist, journeyed to Copenhagen to meet his Danish counterpart Niels Bohr.
They were old friends and collaborators, and their work had led to an
understanding of the atom. But now they found themselves on opposite sides of a
war. The stage play Copenhagen, by Michael Frayn at the National Theatre in
London from this Thursday, 28 May, explores their disastrous meeting.