Munich: India on Sunday said it faces threats from countries that are "authoritarian, anti-democratic and anti-secular' and voiced concern over d a n g e r s posed by nu cl e a r weapons in the hands of "volatile states', in an apparent reference to Pakistan. Highlighting South Asia's security challenges, national security adviser MK Narayanan pointed out that South Asia has been a "source' as well as a "destination' of proliferation of weapons of mass destruction and said it was a matter of concern if proper steps were not put in place. "What are the key challenges to Asian and global security today? The challenges are many. Quite a few are security-related and are highly daunting in nature,' Narayanan said addressing an international conference on