U.N. should take responsibility for Haiti's deadly cholera epidemic
CNNU.N. blamed for Haitian cholera outbreakBy Martin O'MalleyUpdated 1345 GMT (2045 HKT) August 17, 2015Editor's Note: Martin O'Malley, former governor of Maryland, is a candidate for the Democratic nomination for president of the United States. The opinions expressed in this commentary are his.