Hello started working with bootstrap twitter today i'm trying to understand few things about the framework and i'm building a one page layout but i'cant center three spans can you help me understand better the rows and spans from twitter bootstrap and how can i center them ?http://jsfiddle.net/fBNsd/3/\[code\] <!DOCTYPE html><!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]--><!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8"> <![endif]--><!--[if IE 8]> <html class="no-js lt-ie9"> <![endif]--><!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]--> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <title></title> <meta name="description" content=""> <meta name="viewport" content="width=device-width"> <link rel="stylesheet" href="http://stackoverflow.com/questions/14070304/css/bootstrap.min.css"> <link rel="stylesheet" href="http://stackoverflow.com/questions/14070304/css/bootstrap-responsive.min.css"> <link rel="stylesheet" href="http://stackoverflow.com/questions/14070304/css/main.css"> <script src="http://stackoverflow.com/questions/14070304/js/vendor/modernizr-2.6.2-respond-1.1.0.min.js"></script> </head> <body> <!--[if lt IE 7]> <p class="chromeframe">You are using an <strong>outdated</strong> browser. 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