Here it is –
<?php
/**
* The Header for our theme.
*
* Displays all of the <head> section and everything up till <div id="main">
*
* @package WordPress
* @subpackage Twenty_Twelve
* @since Twenty Twelve 1.0
*/
?><!DOCTYPE html>
<!--[if IE 7 | IE 8]>
<html class="ie" <?php language_attributes(); ?>>
<![endif]-->
<!--[if !(IE 7) | !(IE 8) ]><!-->
<html <?php language_attributes(); ?>>
<!--<![endif]-->
<head>
<meta charset="<?php bloginfo( 'charset' ); ?>" />
<meta name="viewport" content="width=device-width" />
<title><?php wp_title( '|', true, 'right' ); ?></title>
<link rel="profile" href="https://gmpg.org/xfn/11" />
<link rel="pingback" href="<?php bloginfo( 'pingback_url' ); ?>" />
<?php // Loads HTML5 JavaScript file to add support for HTML5 elements in older IE versions. ?>
<!--[if lt IE 9]>
<script src="<?php echo get_template_directory_uri(); ?>/js/html5.js" type="text/javascript"></script>
<![endif]-->
<?php wp_head(); ?>
</head>
<body <?php body_class(); ?>>
<div id="page" class="hfeed site">
<header id="masthead" class="site-header" role="banner">
<hgroup>
<h1 class="site-title"><a>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>
<h2 class="site-description"><?php bloginfo( 'description' ); ?></h2>
</hgroup>
<?php $header_image = get_header_image();
if ( ! empty( $header_image ) ) : ?>
<a>"><img src="<?php echo esc_url( $header_image ); ?>" class="header-image" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="" /></a>
<?php endif; ?>
<nav id="site-navigation" class="main-navigation" role="navigation">
<h3 class="menu-toggle"><?php _e( 'Menu', 'twentytwelve' ); ?></h3>
<div class="skip-link assistive-text"><a href="#content">"><?php _e( 'Skip to content', 'twentytwelve' ); ?></a></div>
<?php wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' => 'nav-menu' ) ); ?>
</nav><!-- #site-navigation -->
</header><!-- #masthead -->
<div id="main" class="wrapper">
[Moderator Note: Please post code or markup snippets between backticks or use the code button. Or better still – use the pastebin. As it stands, your code has now been permanently damaged/corrupted by the forum’s parser.]