Allyson Felix just broke Usain Bolt's record[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); if (window.location.hostname.match('\.rebelmouse.com$')) { ga('create', 'UA-26184524-1', {'cooki