Lyra McKee was a 29 year old investigative journalist shot dead while observing rioting in Londonderry. Lyra's friend Peter Geoghegan, co-founder of The Ferret, talks about her work.Also on the show, Amol Rajan is joined by Jo Elvin, editor of You magazine, Cate Sevilla, former editor in chief of The Pool, and Olivia Crellin, co-founder of PressPad.Producer: Richard Hooper