Usain Bolt could make history during this weekend 's 100m final . He 'd match Carl Lewis ' record of back-to-back 100m titles . Score: 6 Could either one of them break the 9.4s barrier ?
Usain Bolt could make history during this weekend 's 100m final . He 'd match Carl Lewis ' record of back-to-back 100m titles . But he has friend Yohan Blake hot on his heels . Could either one of them break the 9.4s barrier ?