 Complete the following phrase:  Mulugeta Gebrehiwot Berhe is a peace researcher holding the position, , of a senior fellow at the World Peace Foundation, Tufts University. He was a rebel of the Ethiopian Peoples Revolutionary Democratic Front EPRDF while the EPRDF was a guerilla army. He led the disarmament, demobilization and reintegration program of the 380,000 armed rebels after the EPRDF gained control of Ethiopia in 1991. Mulugeta was a mediator in the Darfur Peace Agreement negotiations that led to the 2006 Abuja Agreement and the 2011 Doha Agreement during peace process for the 