Silver medallists Elana Meyers and Lauryn Williams of the U.S. celebrate during the victory ceremony for women's bobsleigh at the Sochi 2014 Winter Olympic Games February 20, 2014. REUTERS/Shamil Zhumatov (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Silver medallists Elana Meyers and Lauryn Williams of the U.S. (L) and compatriots, bronze medallists Aja Evans and Jamie Greubel celebrate during the victory ceremony for women's bobsleigh at the Sochi 2014 Winter Olympic Games February 20, 2014. REUTERS/Shamil Zhumatov (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH TPX IMAGES OF THE DAY)

Gold medallists Canada's Kaillie Humphries and Heather Moyse (C) silver medallists Elana Meyers and Lauryn Williams of the U.S. (L) and bronze medallists Aja Evans and Jamie Greubel of the U.S., celebrate during the victory ceremony for women's bobsleigh at the Sochi 2014 Winter Olympic Games February 20, 2014. REUTERS/Eric Gaillard (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH TPX IMAGES OF THE DAY)

Gold medallists Canada's Kaillie Humphries and Heather Moyse (C) silver medallists Elana Meyers and Lauryn Williams of the U.S. (L) and bronze medallists Aja Evans and Jamie Greubel of the U.S., celebrate during the victory ceremony for women's bobsleigh at the Sochi 2014 Winter Olympic Games February 20, 2014. REUTERS/Shamil Zhumatov (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Gold medallists Canada's Kaillie Humphries and Heather Moyse (C) silver medallists Elana Meyers and Lauryn Williams of the U.S. (L) and bronze medallists Aja Evans and Jamie Greubel of the U.S., celebrate during the victory ceremony for women's bobsleigh at the Sochi 2014 Winter Olympic Games February 20, 2014. REUTERS/Phil Noble (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Gold medallists Canada's Kaillie Humphries and Heather Moyse (C) silver medallists Elana Meyers and Lauryn Williams of the U.S. (L) and bronze medallists Aja Evans and Jamie Greubel of the U.S., listen to the national anthem during the victory ceremony for women's bobsleigh at the Sochi 2014 Winter Olympic Games February 20, 2014. REUTERS/Eric Gaillard (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers (front) and Lauryn Williams of the U.S. are congratulated after completing a run in the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Murad Sezer (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers and Lauryn Williams of the U.S. speed down the track during the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers and Lauryn Williams of the U.S.celebrate with team members after completing a run during the women's bobsleigh event at the Sochi 2014 Winter Olympics February 19, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers and Lauryn Williams of the U.S.celebrate after completing a run during the women's bobsleigh event at the Sochi 2014 Winter Olympics February 19, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers (R) and teammate Lauryn Williams of the U.S. celebrate their second place in the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Murad Sezer (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Third placed pilot Jamie Greubel (R) and teammate Aja Evans (2nd R) of the U.S. , winners Canada's pilot Kaillie Humphries (2nd L) and teammate Heather Moyse (3rd R) and second-placed pilot Elana Myers (3rd L) and teammate Lauryn Williams (L) of the U.S. pose during the flower ceremony for the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Third placed pilot Jamie Greubel (R) and teammate Aja Evans (2nd R) of the U.S. , winners Canada's pilot Kaillie Humphries (2nd L) and teammate Heather Moyse (3rd R) and second-placed pilot Elana Myers (3rd L) and teammate Lauryn Williams (L) of the U.S. pose during the flower ceremony for the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers and Lauryn Williams of the U.S. celebrate during the flower ceremony for the women's bobsleigh event at the Sochi 2014 Winter Olympics February 19, 2014. Canada 1 finished first ahead of United States 1 and United States 2. REUTERS/Murad Sezer (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Canada's pilot Kaillie Humphries (2nd L) and Heather Moyse (R) celebrate with pilot Elana Myers (L) and Lauryn Williams of the U.S. during the flower ceremony for the women's bobsleigh event at the Sochi 2014 Winter Olympics February 19, 2014. Canada 1 finished first ahead of United States 1 and United States 2. REUTERS/Arnd Wiegmann (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers and Lauryn Williams of the U.S., Canada's pilot Kaillie Humphries and Heather Moyse and pilot Jamie Greubel and Aja Evans of the U.S. (L-R) celebrate during the flower ceremony for the women's bobsleigh event at the Sochi 2014 Winter Olympics February 19, 2014. Canada 1 finished first ahead of United States 1 and United States 2. REUTERS/Murad Sezer (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers and Lauryn Williams of the U.S. speed down the track during the women's bobsleigh event at the Sochi 2014 Winter Olympics February 19, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers and teammate Lauryn Williams of the U.S. speed down the track during the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers (L) of the U.S. hugs teammate Lauryn Williams after completing a run in the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers (front) reacts after completing a run with teammate Lauryn Williams during the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 19, 2014. REUTERS/Murad Sezer (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers (front) and Lauryn Williams of the U.S. are congratulated after completing a run in the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 18, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers (front) and Lauryn Williams of the U.S. start a run in the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 18, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers (front) and Lauryn Williams of the U.S. start a run in the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 18, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers and Lauryn Williams of the U.S. speed down the track during the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 18, 2014. REUTERS/Murad Sezer (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Myers and Lauryn Williams of the U.S. are congratulated after completing a run in the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 18, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS)

Pilot Elana Meyers (front on R) gestures as she and Lauryn Williams of the U.S. finish a run during the women's bobsleigh competition at the 2014 Sochi Winter Olympics February 18, 2014. Coaches Todd Hays (foreground) and Stu McMillan wait on left to greet them. REUTERS/Fabrizio Bensch (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers (front) of the U.S. reacts after completing a run with teammate Lauryn Williams during the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 18, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS TPX IMAGES OF THE DAY)

Pilot Elana Meyers (L) and Lauryn Williams of the U.S. slaps hands with after they finished a run during the women's bobsleigh competition at the 2014 Sochi Winter Olympics February 18, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

The coaches of pilot Elana Myers (front on R) and Lauryn Williams of the U.S. wait for them as they finish a run during the women's bobsleigh competition at the 2014 Sochi Winter Olympics February 18, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers and Lauryn Williams of the U.S. speed down the track during the women's bobsleigh event at the 2014 Sochi Winter Olympics, at the Sanki Sliding Center in Rosa Khutor February 18, 2014. REUTERS/Murad Sezer (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS TPX IMAGES OF THE DAY)

Pilot Elana Meyers and Lauryn Williams (L) of the U.S. high-five in front of their coach after completing a run in the women's bobsleigh competition at the 2014 Sochi Winter Olympics February 18, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Meyers (front) gestures as she and Lauryn Williams of the U.S. complete a run during the women's bobsleigh competition at the 2014 Sochi Winter Olympics February 18, 2014. REUTERS/Fabrizio Bensch (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

Pilot Elana Myers (front) and Lauryn Williams of the U.S. speed down the track during the women's bobsleigh competition at the 2014 Sochi Winter Olympics February 18, 2014. REUTERS/Arnd Wiegmann (RUSSIA - Tags: OLYMPICS SPORT BOBSLEIGH)

U.S. women's bobsleigh head coach Todd Hays (L) helps brakeman Lauryn Williams, a gold medallist at the 2012 London Summer Olympics, load luggage onto a bus after arriving at the Coastal Athletes Village for the 2014 Sochi Winter Olympics, January 30, 2014. The opening ceremony for the winter games will take place February 7. REUTERS/David Goldman/Pool (RUSSIA - Tags: SPORT BOBSLEIGH OLYMPICS) 

(L to R) Tianna Madison, Bianca Knight, Jeneba Tarmoh and Lauryn Williams of the U.S. celebrate after winning their women's 4x100m relay heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/David Gray (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Lauryn Williams of the U.S. runs with the baton ahead of team mate Bianca Knight (L) in their women's 4x100m relay heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/Stefano Rellandini (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Lauryn Williams of the U.S. celebrates after running the last leg in the women's 4x100m relay round 1 heat at the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/David Gray (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Lauryn Williams of the U.S. reacts after the final leg in her women's 4x100m relay heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/David Gray (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Tianna Madison (R) and Lauryn Williams of the U.S. celebrate after taking first place in their women's 4x100m relay heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: SPORT ATHLETICS OLYMPICS)

Lauryn Williams of the U.S. waves after her women's 4x100m relay heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Lauryn Williams of the U.S. celebrates after her team won their women's 4x100m relay heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/Dylan Martinez (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Lauryn Williams of the U.S. competes in her women's 4x100m relay heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: SPORT ATHLETICS OLYMPICS)

Competitors (R to L) Aleen Bailey of Jamaica, Debbie Ferguson-McKenzie of Bahamas, winner Shelly-Ann Fraser of Jamaica (lane 3), second placed Kerron Stewart of Jamaica (lane 4), third placed Carmelita Jeter of the U.S. (lane 5), Veronica Campbell-Brown of Jamaica, Chandra Sturrup of Bahamas and Lauryn Williams of the U.S. cross the finish line in the women's 100 meters final during the world athletics championships at the Olympic stadium in Berlin August 17, 2009. REUTERS/Tobias Schwarz (GERMANY SPORT ATHLETICS) 

Competitors (R to L) Aleen Bailey of Jamaica, Debbie Ferguson-McKenzie of Bahamas, Shelly-Ann Fraser of Jamaica
Kerron Stewart of Jamaica, Carmelita Jeter of the U.S. Veronica Campbell-Brown of Jamaica, Chandra Sturrup of Bahamas
Lauryn Williams of the U.S. start in the women's 100 meters final during the world athletics championships at the Olympic stadium in Berlin August 17, 2009. REUTERS/Max Rossi (GERMANY SPORT ATHLETICS) 

Shelly-Ann Fraser (2nd L) of Jamaica runs to win ahead of Lauryn Williams of the U.S. (L) and Kerron Stewart (R) of Jamaica in their women's 100 meters semi-final first heat during the world athletics championships at the Olympic stadium in Berlin, August 17, 2009. REUTERS/Wolfgang Rattay (GERMANY SPORT ATHLETICS) 

Shelly-Ann Fraser (L) of Jamaica crosses the finish line ahead of Lauryn Williams (C) of the U.S. and Kerron Stewart (R) of Jamaica in their women's 100 meters semi-final heat during the world athletics championships at the Olympic stadium in Berlin, August 17, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Lauryn Williams (L) of the U.S. competes in the women's 100 metres second heat quarter-final event during the world athletics championships at the Olympic stadium in Berlin, August 16, 2009. REUTERS/Dominic Ebenbichler (GERMANY) 

Lauryn Williams of the U.S. crosses the finish line winning her women's 100 meters second round heat during the world athletics championships at the Olympic stadium in Berlin, August 16, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Lauryn Williams (C) of the U.S. crosses the finish line ahead of Vida Anim (L) of Ghana and Tahesia Harrigan (R) of the British Virgin Islands in their women's 100 meters second round heat during the world athletics championships at the Olympic stadium in Berlin, August 16, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Vida Anim of Ghana, Lauryn Williams of the U.S., Tahesia Harrigan of the British Virgin Islands and Aleen Bailey of Jamaica (L-R) compete in the women's 100 metres second heat quarter-final event during the world athletics championships at the Olympic stadium in Berlin, August 16, 2009. REUTERS/Max Rossi (GERMANY) 

Eleni Artymata of Cyprus, Vida Anim of Ghana, Lauryn Williams of the U.S., Tahesia Harrigan of the British Virgin Islands and Aleen Bailey of Jamaica (L-R) compete in the women's 100 metres second heat quarter-final event during the world athletics championships at the Olympic stadium in Berlin, August 16, 2009. REUTERS/Tobias Schwarz (GERMANY) 

Momoko Takahashi of Japan and Lauryn Williams (R) of the U.S. compete in the women's 100 metres seventh heat event during the world athletics championships at the Olympic stadium in Berlin, August 16, 2009. REUTERS/Phil Noble (GERMANY) 

Momoko Takahashi of Japan, Lauryn Williams of the U.S. and Terani Faremiro of French Polynesia (L-R) finish in the women's 100 metres seventh heat event during the world athletics championships at the Olympic stadium in Berlin, August 16, 2009. REUTERS/Michael Dalder (GERMANY) 

Allyson Felix (C) leads Lauryn Williams (L) and Biana Knight en route to winning the women's 200 meter final at the U.S. track and field championships in Eugene, Oregon June 28, 2009. REUTERS/Richard Clement (UNITED STATES SPORT ATHLETICS) 

Allyson Felix (C) leads Lauryn Williams (L) and Biana Knight en route to winning the women's 200 meter final at the U.S. track and field championships in Eugene, Oregon June 28, 2009. REUTERS/Richard Clement (UNITED STATES SPORT ATHLETICS) 

Lauryn Williams of the U.S. crosses the finish line winning the women's 200m dash event at the Reebok Grand Prix athletics meet in New York May 30, 2009. REUTERS/Shannon Stapleton (UNITED STATES SPORT ATHLETICS) 

Veronica Campbell-Brown (L), two-time Olympic 200-meter gold medalist from Jamaica, smiles as sprinter Lauryn Williams from the United States speaks during the Reebok Grand Prix athletics meet news conference in New York May 28, 2009. REUTERS/Shannon Stapleton (UNITED STATES SPORT ATHLETICS) 

Jamaica's Shelly-Ann Fraser (C) runs to win the women's 100 metres race next to Lauryn Williams of the U.S. (L) and Debbie Ferguson-McKenzie of the Bahamas at the IAAF World Athletics Final in Stuttgart September 14, 2008. REUTERS/Michaela Rehle (GERMANY) 

Lauryn Williams (C) of the U.S. wins the women's 100m race at the British Athletics Grand Prix in Gateshead, northern England, August 31, 2008. REUTERS/Nigel Roddis (BRITAIN) 

Torri Edwards (rear) of the U.S. and Lauryn Williams drop their baton during their women's 4 x 100m relay heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 21, 2008. REUTERS/Jerry Lampen (CHINA)