(February 24, 2016, 10:43 AM EST) -- NEW ORLEANS — The City of New Orleans and a financial guarantee insurance and management services company recently briefed the Fifth Circuit U.S. Court of Appeals over whether an agreement between them obligated the latter to retain its credit worthiness (The City of New Orleans v. Ambac Assurance Corp. and Ambac Financial Services LLC, No. 15-30532, 5th Cir.)....