Six months ago this week, the world was shocked as Vladamir Putin waged his war on Ukraine. 
As the first explosions rang out around the country we spoke to Ukrainian resident Olga Polotska as she hid in her Kyiv flat and to former Russia resident and expert Samuel Greene about how the unimaginable had become a reality. 
Today we catch up with them again.
Featured:
Olga Polotska, Kyiv resident, executive director of the National Research Foundation of Ukraine 
Professor Samuel Greene, director of King's Russia Institute & Professor of Russian Politics, King's College London