U.S. sprinter Allyson Felix

Track and field star Allyson Felix is currently vying for the final U.S. spot on the women's 100-meter Olympic team, after reaching a dead heat with Jeneba Tarmoh.

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United States' Allyson Felix celebrates her in win the women's 200-meters during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Wednesday, Aug. 8, 2012.

Olympics Day 12 - Athletics

LONDON, ENGLAND - AUGUST 08: Allyson Felix of the United States celebrates after winning gold in the Women's 200m Final on Day 12 of the London 2012 Olympic Games at Olympic Stadium on August 8, 2012 in London, England. (Photo by Ezra Shaw/Getty Images)

Olympics Day 12 - Athletics

LONDON, ENGLAND - AUGUST 08: Allyson Felix of the United States celebrates winning gold in the Women's 200m Final on Day 12 of the London 2012 Olympic Games at Olympic Stadium on August 8, 2012 in London, England. (Photo by Paul Gilham/Getty Images)

Olympics Day 12 - Athletics

LONDON, ENGLAND - AUGUST 08: Allyson Felix of the United States celebrates after winning gold in the Women's 200m Final on Day 12 of the London 2012 Olympic Games at Olympic Stadium on August 8, 2012 in London, England. (Photo by Stu Forster/Getty Images)

Olympics Day 12 - Athletics

LONDON, ENGLAND - AUGUST 08: Allyson Felix of the United States celebrates after winning gold in the Women's 200m Final on Day 12 of the London 2012 Olympic Games at Olympic Stadium on August 8, 2012 in London, England. (Photo by Ezra Shaw/Getty Images)

Olympics Day 12 - Athletics

LONDON, ENGLAND - AUGUST 08: Allyson Felix of the United States celebrates after winning gold in the Women's 200m Final on Day 12 of the London 2012 Olympic Games at Olympic Stadium on August 8, 2012 in London, England. (Photo by Michael Steele/Getty Images)

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United States' Allyson Felix starts in the women's 200-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Wednesday, Aug. 8, 2012. (AP Photo/Matt Dunham)

Olympics Day 12 - Athletics

LONDON, ENGLAND - AUGUST 08: Allyson Felix of the United States celebrates after winning gold in the Women's 200m Final on Day 12 of the London 2012 Olympic Games at Olympic Stadium on August 8, 2012 in London, England. (Photo by Quinn Rooney/Getty Images)

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United States' Allyson Felix crosses the finish line to win gold in the women's 200-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Wednesday, Aug. 8, 2012. (AP Photo/Matt Slocum)

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United States' Allyson Felix, center, crosses the finish line to win the women's 200-meters final ahead of compatriot Carmelita Jeter, left, and Ivory Coast's Murielle Ahoure during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Wednesday, Aug. 8, 2012. (AP Photo/Lee Jin-man)

Carmelita Jeter and Allyson Felix compete in the women's 100m semi finals at the U.S. Olympic Track and Field Trials Saturday, June 23, 2012, in Eugene, Ore. (AP Photo/Eric Gay)

Golden Grand Prix Kawasaki 2012

KAWASAKI, JAPAN - MAY 06: Allyson Felix of the United States celebrates after winning the Women's 100m during the Seiko Golden Grand Prix Kawasaki at Todoroki Stadium on May 6, 2012 in Kawasaki, Japan. (Photo by Kiyoshi Ota/Getty Images)

2012 Team USA Media Summit

DALLAS, TX - MAY 13: Track athlete, Allyson Felix poses for a portrait during the 2012 Team USA Media Summit on May 13, 2012 in Dallas, Texas. (Photo by Ronald Martinez/Getty Images)

2012 U.S. Olympic Track & Field Team Trials - Day 2

EUGENE, OR - JUNE 23: Jeneba Tarmoh (L) and Allyson Felix look on after competing in the women's 100 meter dash final during Day Two of the 2012 U.S. Olympic Track & Field Team Trials at Hayward Field on June 23, 2012 in Eugene, Oregon. (Photo by Michael Heiman/Getty Images)

2012 U.S. Olympic Track & Field Team Trials - Day 2

EUGENE, OR - JUNE 23: Allyson Felix competes in the women's 100 meter dash semi-final during Day Two of the 2012 U.S. Olympic Track & Field Team Trials at Hayward Field on June 23, 2012 in Eugene, Oregon. (Photo by Andy Lyons/Getty Images)

2012 Prefontaine Classic

EUGENE, OR - JUNE 02: Allyson Felix of the USA wins the 200m at the Samsung Diamond League Prefontaine Classic at Hayward Field on June 2, 2012 in Eugene, Oregon. (Photo by Craig Mitchelldyer/Getty Images)

2012 Team USA Media Summit

DALLAS, TX - MAY 13: Track athlete, Allyson Felix poses for a portrait during the 2012 Team USA Media Summit on May 13, 2012 in Dallas, Texas. (Photo by Ronald Martinez/Getty Images)

FILE - This May 6, 2012 file photo shows Allyson Felix of the United States, (1), crosses the finish line ahead of Chisato Fukushima, of Japan, (50), and Anna Doi of Japan, left, during the Women's 100-meter race at the Golden Grand Prix in Kawasaki, Japan. If Felix is looking for advice about whether to try the 200-400 double at the Olympics, Michael Johnson has a message for her: Don't bother. (AP Photo/Shizuo Kambayashi, File)

FILE - This May 6, 2012 file photo shows Allyson Felix of the United States, (1), crosses the finish line ahead of Chisato Fukushima, of Japan, (50), and Anna Doi of Japan, left, during the Women's 100-meter race at the Golden Grand Prix in Kawasaki, Japan. If Felix is looking for advice about whether to try the 200-400 double at the Olympics, Michael Johnson has a message for her: Don't bother. (AP Photo/Shizuo Kambayashi, File)

2012 Team USA Media Summit

DALLAS, TX - MAY 13: Track athlete, Allyson Felix poses for a portrait during the 2012 Team USA Media Summit on May 13, 2012 in Dallas, Texas. (Photo by Ronald Martinez/Getty Images)