pAt 17, Malala Yousafzai has become the youngest-ever winner of the Nobel Peace prize, which she shares with India's Kailash Satyarthi, the leader of a global movement to end child slavery and child labour. Also in The World This Week: the Syrian border town of Kobani is still the theatre of fierce fighting, with jihadists controlling between a quarter and a third of the town despite coalition air strikes.