Article Photos: Las Vegas qualifying canceled by heavy rain

A track security guard walks along pit road during a rain delay before practice for the NASCAR Nationwide and Sprint Cup Series auto race, Friday, March 8, 2013 in Las Vegas. (AP Photo/Julie Jacobson)

A track security guard walks along pit road during a rain delay before practice for the NASCAR Nationwide and Sprint Cup Series auto race, Friday, March 8, 2013 in Las Vegas. (AP Photo/Julie Jacobson)