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It's looking less and less likely that Rudy Giuliani will end up challenging Kirsten Gillibrand for her Senate seat in 2010. Two weeks ago, Giuliani aides suggested the ex-mayor would probably announce his candidacy within "the next 48 hours." But there hasn't been any news of a political bid since then, and today Rudy's security firm announced it will be advising Rio de Janiero on its preparations for the Olympic Games in 2016. Rio is one of the world's most dangerous cities, of course. So that should keep him busy for the next six years, no? [NYDN]