"Clean athletes' dreams are being destroyed because of the reprehensible behavior of other athletes and officials."
Top Reuters photos from the last 24 hours.
Top photos from the last 24 hours.
Highlights from the 15th IAAF World Championships in Beijing.
Coe has previously said that under his leadership the sport would move towards setting up its own anti-doping agency.
"So many athletes appear to have doped with impunity, and it is damning that the IAAF appears to have sat idly by...