More than 1,000 current and former Doctors Without Borders employees have signed an open letter demanding the aid organization root out its institutionally racist, colonialist and white supremacist policies while examining its hiring practices and workplace culture.A manager in the United States and a former supervisor in South Sudan talk to The Take about the discrimination and racism they’ve experienced, and their colleagues’ fears about speaking out.In this episode:Alaak Dau, former logistics supervisor for Doctors without Borders in South Sudan, and Urshula Edwards, supply manager.Connect with The Take: Twitter (@ajthetake), Instagram (@ajthetake) and Facebook (@TheTakePod).