WASHINGTON - Tim Russert, an unrelenting interrogator as host of NBC's "Meet the Press," said Friday it was painful having the tables turned on him by lawyers defending former White House aide I. Lewis "Scooter" Libby against perjury and obstruction charges. The day after Russert spent five grueling hours on the witness stand in Libby's trial, the NBC newsman took questions in the much friendlier setting of an interview on the set of the "Today" show with his network colleagues. Asked how it felt to be on the other end of rapid-fire questioning, Russert said, "It's a lot of easier...