Last Suday it was an hour at 3pm est. I believe I saw a promo that said it's at 5pm next Sunday.
I'm sure you can go to the CBS Sports website and get their broadcast schedule.
RichC
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Training: 2002 Fuji Roubaix Pro (105 triple)
Commuting/Daytripping: 2001 Airborne Carpe Diem (Ultegra/XTR, touring wheels)
Commuting/Touring: 2000 Novara Randonee (Sora/Tiagra/LX, fenders, lights)