'We were so close': how unrest in Congo thwarted the battle against Ebola

World Health Organization rues spike in violence that impeded efforts of health workers when outbreak was almost under control

The men who came to the village of Ntombi in the Democratic Republic of the Congo in mid-December aimed to spare no one.

Militants with the Allied Democratic Forces (ADF), one of dozens of armed groups operating in DRC's North Kivu, they hacked to death women and children, killing 22 people in a single incident in one of a series of attacks over the course of a weekend that left 43 dead in total.