The researcher, the pope and the Stasi's friends in the west | World news | The Guardian
Helmut Müller-Enbergs, visiting professor at Gotland University in
Sweden, has managed to find out more about over a thousand of these
people, using data found on the so-called Rosenholz discs. These are
rudimentary CD-Roms containing snapshots of around 350,000 hugely
sensitive Stasi records which somehow ended up in the hands of the CIA,
before finally being returned to Germany in 2003 – albeit only those
files pertaining to German citizens, a continuing source of frustration
for the BStU.