As the third anniversary of Russia's invasion of Ukraine approaches, we explore how the country will be rebuilt, who is coming up with the redesign of damaged cities, and what they might look like in the future. We hear from Lord Norman Foster, the famous British architect who is working on a masterplan for the city of Kharkiv and look at rebuilding projects in the towns near Kyiv. We also ask what lessons can be learnt from other post-war cities, such as Warsaw and Sarajevo.