Can information become a weapon of war? Oleksandra Matviichuk, whose organisation was awarded the Nobel Peace Prize, is documenting alleged Russian war crimes against Ukraine. She talks to Babita Sharma about how she uncovers the evidence. Babita also speaks to Anastasiia Romaniuk, a young Ukrainian digital platforms analyst, who is exposing disinformation around the war, and to Lisa Kaplan, founder and CEO of a US company which helps organisations protect themselves from social media manipulation.