Armstrong offered to donate $ 250,000 to anti-doping agency . NEW : Media reports say Armstrong admitted to using performance - enhancing drugs . Source tells CNN the former cyclist in talks to repay some sponsorship ##s . Interview with Winfrey for 2 1/2 hours , talk show queen tweets . Armstrong apologizes to his foundation staff for their stress .
NEW : Media reports say Armstrong admitted to using performance - enhancing drugs . Source tells CNN the former cyclist in talks to repay some sponsorship ##s . Interview with Winfrey for 2 1/2 hours , talk show queen tweets . Armstrong apologizes to his foundation staff for their stress .