Four days after Russian tanks rolled into Ukraine, Panorama reports on the conflict. With Paul Kenyon in Kyiv and Jane Corbin in London, the programme asks what lies behind Putin's invasion, and how Ukraine and the rest of the world have responded.

Evidence of racist violence and anti-semitism at Polish and Ukrainian football matches.

Vladimir Putin, after eight years as president of Russia and four more as prime minister, is stubbornly holding on to power.

Despite the huge risks, two Russian film-makers have been filming the impact of the invasion of Ukraine in their country. Many thousands have fled. Those that have stayed have had to make a choice – oppose the war, support it, or stay silent.

Geoffrey Smith's moving film follows Henry as he travels to Kiev to help Igor operate on a young man called Marian, who without surgery has just months to live. When Henry arrives, he faces a serious challenge - Marian must be awake when his tumour is removed, and Henry must use the most basic tools, including a Black and Decker drill.

UNICEF estimates that there may be as many as 100,000 street children in Ukraine. Marcel Theroux and Suemay Oram go underground in Kiev to meet some and find out what their life is like.