A look at what compels an age-grouper or an elite amateur to risk their health and/or reputation.
The 89-page report reveals evidence of more wrongdoing by IAAF leadership.
As the sport emerges from its grassroots beginnings, it finds itself at a rather challenging inflection point.
The country's athletics program is coming under an increasing amount of scrutiny.
As of right now, the country is not eligible for next summer's Olympic Games.
The organization is suggesting that the IAAF remove Russia from taking part in international competition.
The marathon world record holder goes on the defensive in strongly worded 1,700-word statement.
The marathon world-record holder says the data can be easily misunderstood and misinterpreted.
Asli Cakir Alptekin has been stripped of her Olympic title and will serve an eight-year ban for blood doping.