LONDON — It takes something to upstage Usain Bolt in an Olympic Stadium. Then again, there is only one long-distance runner quite like Mo Farah.
The British great came out onto the track Friday after Bolt had absorbed the adulation of the crowd just by showing up and coasting to victory in his opening 100-meter heat.
For Bolt it was easy. Farah still had one of the toughest races of his life coming up — an all-out assault by the best African runners to wear him down to sap his finishing speed. There was even a trip and stumble on the final lap that could have felled him.
"I am mentally strong," said the 34-year-old Farah, who was born in...