I saw this story on Yahoo:
Here is the paragraph that really caught my eye:
"As Armstrong got into his team car, a mechanic showed him that his bike was also in a bad way with the chain stay, which runs between the central cranks and the rear gear mechanism, broken.
If the stage had finished on a descent, the broken frame could have caused him to crash. "
I haven't seen mention of this anywhere else, though. But if he really did break his chainstay, how could he have kept riding? Wouldn't the bike more or less collapse as was riding it? Or, at the very least rob him of some of his power.
Any thoughts on this?