KANSAS CITY, KS - APRIL 20: A "B Strong" logo is displayed on the #16 ACE Brand Ford of Greg Biffle in tribute to victims of the Boston Marathon attack during practice for the NASCAR Sprint Cup ... more 
KANSAS CITY, KS - APRIL 20: A "B Strong" logo is displayed on the #16 ACE Brand Ford of Greg Biffle in tribute to victims of the Boston Marathon attack during practice for the NASCAR Sprint Cup Series STP 400 at Kansas Speedway on April 20, 2013 in Kansas City, Kansas. (Photo by Jeff Zelevansky/Getty Images) less 
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Getty Images | Photo By Jeff Zelevansky / Getty Images
Sat, Apr 20, 2013 10:29 AM EDT