Russian president Vladimir Putin's motives and aims are at the heart of the Ukraine crisis.
In this week's Profile, Mary Ann Sieghart speaks to those who've watched him closely to explore how his life has shaped his view of the world, and Russia's place in it.
We hear about his life as KGB agent, his volatile temper, and the role religion now plays in his life and politics.
Producer: Chris Bowlby
Editor: Richard Knight.