Next week, when this Olympics is over, I'll have something mre to say about its track and field events. For now, two quick thoughts: First, I am happy to report that the first double amputee in Olympic history ran a qualifying heat Saturday. The athlete, Oscar Pistorius of South Africa (aka the "blade runner"), did quite well in the 400 meters, finishing in 45.44 seconds, and qualifying for the semifinals. Yes, his "blades" create issues. How far in the direction of 'bionics' will atheletes be allowed to go. Does the design of his blades give him an unfair advantage over able-bodied runners? But I don't care. I'm happy for him. So, it seems, are many of his competitors. The relevant authorities will just have to deal with such issues in an ad hoc way as they develop in Olympics to come. Second, yes, Usain Bolt is amazing. His performance shows we he is worth every penny of the $10 million a year that Puma pays him for his endorsements. ...