Ten years ago, Solomon Maina's daughter, Debora, was one of 276 schoolgirls kidnapped from their dormitory in the middle of the night by Nigeria's Boko Haram Islamist militants.
Global outrage was swift. A ubiquitous "Bring Back Our Girls" campaign, drawing support from the likes of Michelle Obama and Sylvester Stallone, shined a spotlight on the abductions. Then, in 2016 and 2017, negotiations led to the highly publicized liberation of around 100 of the captives.
Debora was not one of them.