and undercover filming challenges. this year—long investigation by njeri mwangi and judith kanaitha for bbc africa eye uncovered damning evidence of a thriving underground network in stolen children in kenya. this secretive and highly lucrative trade preys in the country's most vulnerable, stealing children from homeless women and even from the maternity ward of a major government hospital in the heart of nairobi. the women in the streets are very desperate, and for many reasons, poverty being one of them. they're told, they're convinced that they can make some money, so they sell their children.