Niagara cyclists react to Armstrong doping allegations

He’s one of the most recognizable sports figures in the world.

But as Lauran Sabourin reports, Lance Armstrong’s cycling career may be tarnished after two teammates have come forward, accusing Armstrong of taking performance-enhancing drugs.

Watch the 60 Minutes story:
Part 1:

Part 2:

Reporter Scott Pelley on reporting the Lance Armstrong story:

Who is Tyler Hamilton?