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Microsoft has been making Google miserable for a year over its DoubleClick purchase — and now, with Microsoft trying to buy Yahoo, it's payback time. That's the true meaning of top Google lawyer David Drummond's statement about the Microsoft bid. He's not saying that the deal is anticompetitive: He's just asking questions. Expect Google to keep asking, and asking, and asking — all the way up and down Capitol Hill, where the search giant has been steadily building up its lobbying presence. If Microsoft thought its last antitrust battle was torture, it hasn't seen anything yet. Drip, drip, drip.