Russian female pole vaulter Yelena Isinbayeva has broken the world record 27 times, and holds the current mark with 5.06 meters. On Tuesday, she will try to add her third world title to her glowing resume. David Rudisha of Kenya and Abubaker Kaki of Sudan are expected to duel for the men's 800m championship. Rudisha holds the world record but is looking for his first world title.