BUNIA, Democratic Republic of the Congo — People set fire to an Ebola treatment center in a town at the heart of the outbreak in the Democratic Republic of the Congo on Thursday after being stopped from retrieving the body of a local man, a witness and a senior police officer said, as fear and anger grow over a health crisis that doctors are struggling to contain. The arson attack in Rwampara reflects the challenges of health workers trying to curb a rare Ebola virus by using stringent measures