The United States, yesterday, disclosed that Nigeria’s inability to eliminate subsidy on petroleum products and failure to hands off the fixing of electricity tariffs is hampering the provision of critical social infrastructure in the country.  Speaking at the 110th-anniversary colloquium of the Nigerian Development Finance Forum, organized by Financial Nigeria Magazine, the US Ambassador to Nigeria, Mr. Stuart Symington blamed the Federal Government’s inability to discontinue subsidy and allow market forces determine electricity tariffs for Nigeria poor social service delivery system.