Kenya's Invasive Mathenge Menace Causing Untold Suffering

Drought-stricken Northern Kenya faces the worst dry spell in 40 years, with more than 5 million people affected. Worse still, a relentless invasive plant is unleashing even more devastation on the environment, livestock and livelihoods. Francis Ontomwa reports from Isiolo, Kenya. (Camera: Amos Wangwa)