From early July mornings till near noon my big screen, hi-def TV remains on, the volume at a low but audible level: helicopter shots of chateaus, dizzying motorcycle footage of harrowing descents, crazed fans waving flags, dressed outrageously, nearly blocking the roadways on the high mountain summits, close-ups of sweaty, pained expressions…and through it all the familiar, comforting voice of Phil Liggett who, at 79, is this year announcing his 51st Tour de France.