Nobel peace laureate Malala Yousafzai has called for a state of emergency for education in Nigeria. She visited the country and met some of the Chibok schoolgirls whose cause she championed. <br/><br/>The 20-year-old global education campaigner made the suggestion at a meeting with Acting President Yemi Osinbajo at the presidential villa in Abuja. According to the UN children's fund, Unicef, Nigeria has some 10.5 million children out of school — the most in the world — and 60 per cent of them are girls. <br/><br/>Many of them are in the country's northeast, where the Boko Haram insurgency has devastated education in the last nine years, damaging or destroying classrooms and schools.