People walk past the headquarters of the World Bank in Washington, D.C., U.S., on Monday April 9, 2012. Among the candidates being considered to replace current World Bank president Robert Zoellick are Jose Antonio Ocampo, former finance minister of Colombia, Ngozi Okonjo-Iweala, finance minister of Nigeria, and Jim Yong Kim, the U.S. nominee and president of Dartmouth College. Photographer: T.J. Kirkpatrick/Bloomberg via Getty Images