Can Ukraine 'hold the line'?

Russian forces continue to press ahead with their offensive in the Kharkiv region of north-east Ukraine as President Zelensky signs two new laws to boost army recruitment as Ukraine struggles to mobilise fighters. How much is Kyiv now on the back foot in the war?Also in the programme: Ecologists in Costa Rica have just completed one of the largest ever "eco-acoustic" surveys recording sounds of forests regenerating across the entire country; and the Vatican has said Catholics need to be more cautious about accepting phenomena as supernatural.(Photo: Local residents react after a rocket attack on a residential area in Kharkiv, north-eastern Ukraine, 7 April 2024, amid the Russian invasion. Credit: EPA/Sergey Kozlov)