Full Width Main Post

It’s certainly possible, and is a common thing to do with WordPress:

<?php
  $q = new WP_Query('category_name=category_breaking'); // query that gets all posts in category "category_breaking"
  if( $q->have_posts() ) : // if there are posts returned by query...
    echo "<div id='breaking_news'>"; // start the breaking news section
    while( $q->have_posts() ) : $q->the_post(); // start looping through query results
      echo "<div class="bn_post">"; // single breaking news post start
      echo "<h2>".get_the_title()."</h2>"; // display breaking news post title
      if(has_post_thumbnail()) // if post has featured image set...
      {
        the_post_thumbnail(); // then display featured image
      }
      echo "</div>"; // close single breaking news post
    endwhile;
    echo "</div>"; // close breaking news section
  endif;
?>