RIO DE JANEIRO, BRAZIL - JUNE 04:  The Olympic Rings rise above Madureira Park on June 4, 2015 in Rio de Janeiro, Brazil.  (Photo by Matthew Stockman/Getty Images)

Russian doping: Mad scramble to clear competitors

Motez Bishara, CNN
In a last-minute effort to declare which Russians are eligible to attend the Olympics in Rio, the governing bodies of two dozen sports have been scrambling to clear eligible competitors with the start of the Games just days away.