Concluding two brothers born in Lithuania are now at home in the United States, a federal judge denied their father’s request to order them returned to their native country.In a written opinion last week, U.S. District Judge John J. Tharp Jr. rejected the argument that the boys’ mother is wrongfully retaining them in this country in violation of the Hague Convention on Civil Aspects of International Child Abduction.The boys became “firmly embedded” in the United States in the first three years they …