...Standard & Poor's Ratings Services has assigned its 'A' long-term rating and stable outlook to the City of Shreveport, La.'s series 2015A taxable revenue and refunding bond and series 2015B taxable passenger facility charge (PFC) revenue refunding bonds, which are being issued on behalf of the Shreveport Airport System. At the same time, Standard & Poor's affirmed its 'A+' long-term rating and underlying rating (SPUR) on the city's existing GO bonds. In addition, Standard & Poor's affirmed its 'A' SPUR on the city's existing appropriation debt. The outlook on all bonds is stable. The series 2015A and 2015B bonds are limited obligations of the city payable from and secured by a pledge and dedication of net revenues and the PFC revenues. The city has also pledged and dedicated its lawfully available funds for the payment of debt service on the bonds, but only if the PFC and net system revenues are insufficient to pay debt service. Standard & Poor's considers this pledge to be equivalent to...