CHICAGO--(BUSINESS WIRE)--Fitch Ratings has assigned an 'AA-' underlying rating to Metropolitan Washington Airports Authority's (MWAA) approximately $201 million series 2011A airport system revenue and refunding variable-rate bonds (subseries 2011A-1, 2011A-2, and 2011A-3). MWAA intends to remarket the 2011A bonds and these variable rate bonds will have liquidity support from a direct-pay letter of credit issued by the Royal Bank of Canada (RBC). The Rating Outlook is Stable. The rating reflect