Featured Image covering header
<body <?php body_class(); ?>>
<?php global $post;
$src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), array( 5600,1000 ), false, '' );
?>
<div class="banner" style="background: url(<?php echo $src[0]; ?> );background-size: cover;">
<div class="top">
<div class="container">
<nav class="navbar" role="navigation">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="<?php echo home_url(); ?>">
<img class="img-responsive hidden-xs" src="http://popwebserver03.com/projects/fiu-extreme/wp-content/themes/poptheme/images/logo.png">
<img class="img-responsive visible-xs" src="http://popwebserver03.com/projects/fiu-extreme/wp-content/themes/poptheme/images/logo-mobile.png">
</a>
</div>
<?php
wp_nav_menu( array(
'menu' => 'primary',
'theme_location' => 'primary',
'depth' => 2,
'container' => 'div',
'container_class' => 'collapse navbar-collapse',
'container_id' => 'bs-example-navbar-collapse-1',
'menu_class' => 'nav navbar-nav',
'fallback_cb' => 'wp_bootstrap_navwalker::fallback',
'walker' => new wp_bootstrap_navwalker())
);
?>
</div>
</nav>
</div><!-- .container -->
</div><!-- .top -->
<h2>Research Programs</h2>
</div><!-- .banner -->