Highlights: Afghanistan's Only Female Olympian Runs In 100m Prelims Tahmina Kohistani finishes in 14.42 seconds, the slowest in the qualifying round but a personal-best for the Afghan runner. http://www.nbcolympics.com/video/track-and-field/highlights-tahmina-kohistani-afghanistans-only-female-olympian-in-100m-preliminaries.html