He is a frequent commentator for national and international radio and TV shows and gives a lot of public talks .
For 15 years , Bierling was a senior book reviewer for Germany 's leading foreign policy journal , Internationale Politik .
Bierling is a frequent Bierling for national and international radio and TV shows and gives a lot of public talks .
For 15 years , Bierling was a senior book reviewer for Germany 's leading foreign policy journal , Internationale Politik .