Russian President Vladimir Putin has put the whole idea of nuclear non-proliferation out of the window, says former US security official Fiona Hill.

Dr Hill, former Senior Director for Europe and Russia at the U.S. National Security Council, discusses the dangers facing the world in her new book: There is nothing for you here, Finding Opportunity in the 21st Century.

She discusses with nuclear threat with Today's Justin Webb.

(Photo: Fiona Hill. Credit EPA)