Bosnia Herzegovina is a nation state built on fragile foundations. It emerged from a brutal ethnic war. Its make-up - a Serb mini-state reluctantly yoked to a Muslim Croat federation - is dysfunctional. And there are now fears it could disintegrate. Zeljka Cvijanovic is the Prime Minister of the Republika Srpska enclave in Bosnia. Are the separatist Bosnian Serbs playing with fire? Show less