Swimming World Championships 2007 at Melbourne (aus) Women: 50 m Backstroke March 29: Final: 1. Leila Vaziri (usa) * 28.16 (=WR) 2. Aleksandra Gerasimenia (blr) 28.46 3. Tayliah Zimmer (aus) 28.50 4. Zhao Jing (chn) 28.54 5. Reiko Nakamura (jpn) 28.64 6. Gao Chang (chn) 28.70 7. Mai Nakamura (jpn) 28.86 8. Janine Pietsch (ger) 28.87 * 28.16 (WR) in semifinals