(AFX UK Focus) 2008-12-09 22:50 UPDATE 1-Marriott CFO warns of "tough 2009" (Interactive Investor) LOS ANGELES, Dec 9 (Reuters) - Hotel operator Marriott International Inc expects "to have to navigate through a tough 2009," the company's chief financial officer said on Tuesday. Arne Sorenson said in a blog posting on the company's website that Marriott's debt levels and Timeshare investment spending were expected to decline next year, The company said in October that it expected revenue per ...