Lance Armstrong may testify under oath

In that Oprah interview, Armstrong admitted to doping; something he denied earlier when federal authorities questioned him.

Now, the head of the US Anti-Doping Agency has given Armstrong two-weeks to decide if he will sit down with investigators.

Armstrong reportedly wants to help clean up cycling. If he testifies, Armstrong will have to name the people who helped him dope.

"The reality is Armstrong did not want to be a participant in any deal making. And he got scared," said USA Today sports writer Christine Brennan.

Armstrong is facing federal charges for witness tampering and intimidation.

He may be looking for a deal to get his lifetime ban from cycling reduced.

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