EXHIBIT 1 --------- AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G -------------------------------------------- Each of the undersigned hereby affirms that it is individually eligible to use Schedule 13G, and agrees that this Schedule 13G is filed on its behalf. Dated: February 11, 2009 CITIGROUP GLOBAL MARKETS INC. By: /s/ Riqueza V. Feaster -------------------------------------------- Name: Riqueza V. Feaster Title: Assistant Secretary CITIGROUP FINANCIAL PRODUCTS INC. By: /s/ Riqueza V. Feaster -------------------------------------------- Name: Riqueza V. Feaster Title: Assistant Secretary CITIGROUP GLOBAL MARKETS HOLDINGS INC. By: /s/ Riqueza V. Feaster -------------------------------------------- Name: Riqueza V. Feaster Title: Assistant Secretary CITIGROUP INC. By: /s/ Riqueza V. Feaster -------------------------------------------- Name: Riqueza V. Feaster Title: Assistant Secretary