ssteinker

<article <?php post_class(); ?>>
	<div class="row">
		<div class="col-xs-3">
			<?php 
				if (get_the_post_thumbnail()) {
					echo get_the_post_thumbnail($post_id, 'news-thumbnail', array('class' => 'img-responsive')); 
				} else {
					echo 'kein thumbnail vorhanden';
				}
			?>