Nomadic herders are invading wildlife conservancies in Kenya's Rift Valley in search of pasture for their cattle. That's culminated in violence, as police move in to push the herders out.But some local farmers say it's more complicated, that the cattle don't belong to the herders but to wealthy politicians, who are storing their wealth in cattle and laundering ill-gotten money through cattle. Copyright 2017 NPR. To see more, visit http://www.npr.org/.