400m Prelims-Women More Results All 10000m Run-Men 10000m Run-Women 100m Finals-Men 100m Finals-Women 100m Hurdles Finals-Women 100m Hurdles Prelims-Women 100m Hurdles Semis-Women 100m Prelims-Men 100m Prelims-Women 100m Semis-Men 100m Semis-Women 110m Hurdles Finals-Men 110m Hurdles Prelims-Men 110m Hurdles Semis-Men 1500m Run Finals-Men 1500m Run Finals-Women 1500m Run Semis-Men 1500m Run Semis-Women 200m Finals-Men 200m Finals-Women 200m Prelims-Men 200m Prelims-Women 200m Semis-Men 200m Semis-Women 20K Racewalk-Men 20K Racewalk-Women 3000m Steeplechase Finals-Men 3000m Steeplechase Finals-Women 3000m Steeplechase Semis-Men 3000m Steeplechase Semis-Women 400m Finals -Men 400m Finals -Women 400m Hurdles Finals-Men 400m Hurdles Finals-Women 400m Hurdles Prelims-Men 400m Hurdles Prelims-Women 400m Hurdles Semis-Men 400m Hurdles Semis-Women 400m Prelims-Men 400m Prelims-Women 400m Semis-Men 400m Semis-Women 5000m Run-Men 5000m Run-Women 800m Finals-Men 800m Finals-Women 800m Prellims-Men 800m Prellims-Women 800m Semis-Men 800m Semis-Women Complete Results Decathlon Discus-Men Discus-Women Hammer-Men Hammer-Women Heptathlon High Jump-Men High Jump-Women Javelin-Men Javelin-Women Long Jump-Men Long Jump-Women Pole Vault-Men Pole Vault-Women Shot Put-Men Shot Put-Women Triple Jump-Men Triple Jump-Women Women's 400 Meter Dash Senior - Prelim View event records PlaceAthlete NameAffiliationTimeQualReacTimeHeat(Pl) 1Francena McCororyadidas51.46Q0.2102 (1) 2Debbie DunnNike51.56Q0.2544 (1) 3Natasha Hastingsunattached51.71Q0.2164 (2) 4Allyson FelixNike51.79Q0.2441 (1) 5DeeDee TrotterSaucony51.87Q0.1701 (2) 6Sanya Richards-RossNike52.02Q0.1993 (1) 7Joanna AtkinsAuburn52.18Q0.2382 (2) 8Jessica BeardTexas A&M52.53Q0.2483 (2) 9Mary WinebergNew York Athletic Club (NYAC)52.62Q0.1724 (3) 10Keshia BakerSaucony52.71Q0.1983 (3) 11Leslie Coleunattached52.73Q0.2021 (3) 12Aiesha Gogginsunattached52.84q0.2531 (4) 13Jessica Cousinsunattached52.85q[52.845]0.2674 (4) 14Monica HargroveUnder Armour52.85Q[52.849]0.2882 (3) 15Regina GeorgeArkansas52.89q0.2472 (4) 16Ciara ShortCal-Fullerton52.94q0.1592 (5) 17Angee Henryunattached53.190.2454 (5) 18Shelise WilliamsArkansas53.690.2973 (4) 19Brandi Crossunattached53.770.1841 (5) 20Whitney JonesArkansas53.940.3084 (6) 21Joy EatonU C L A55.150.1963 (5) 22Shareese Woodsunattached55.900.3423 (6)