Kate Adie presents stories from Ukraine, Greenland, the US and Germany.

Ukraine has this week come under its heaviest bombardment in weeks, with the UK and the EU summoning their Russian envoys after their offices in Kyiv were hit. Quentin Sommerville has been in Donetsk, the area Vladimir Putin wants to fully control in the resource rich region of the Donbas, as residents flee attacks and soldiers tell of the intensification of the battle there.

Greenland’s status has been thrust into the spotlight after the US president has repeatedly said he wanted to annexe the semi-autonomous nation for its strategic position and mineral wealth. And despite having broad self-government since 1979, Greenland’s foreign and defence policy is made in Copenhagen. On an island of just over 55,000 people, where fishing is the primary source of income, independence for Greenland would mean either increasing tourism or allowing the mining of minerals like rare earth metals. Bob Howard has been to the capital Nuuk.

In the US, a record number of people are being held in immigrant detention, following President Trump’s crackdown. One controversial site has become the subject of several lawsuits attempting to shut it down: Alligator Alcatraz in Florida. Josephine Casserly reports from the centre, which sits on an abandoned airstrip amid the marshes, forests, mangroves and estuaries and wildlife of the Everglades.

James Naughtie has been in the German city of Weimar, at a cultural festival in the state of Thuringia in Eastern Germany – which reflects on the historical legacy of the Weimar Republic. Among the performances and installations, he found echoes of the past in the present.

Series Producer: Serena Tarling