Upcoming & taxonomy

<?php
global $post;
$paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1;

$args_events = array(
  'post_status'     =>'publish',
  'post_type'       => array(TribeEvents::POSTTYPE),
  'tax_query'       => array(
    array(
      'taxonomy'=>  TribeEvents::TAXONOMY,
      'field'   =>  'slug',
      'terms'   =>  'sweden'
    )
  ),
  'list'            => 'upcoming',
  'posts_per_page'  => 6,
  'paged'           => $paged
);

$all_events = new WP_Query();
$all_events->query($args_events);

if ($all_events->have_posts()) :
  while($all_events->have_posts()) :
    $categories = '';
    $all_events->the_post();
    $categories = get_categories(
      $category_args = array(
        'taxonomy'  =>  TribeEvents::TAXONOMY
      )
    );
    $categories_name = '';
    foreach ($categories as $category) {
      $categories_name .= $category->name;
    }
    ?>
    <article class="col-md-4">
      <div>
        <span class="date"><?php echo implode('<br />', explode(' ',tribe_get_start_date($post->ID, true, 'd M Y'))); ?></span>
        <?php
        if(has_post_thumbnail()){
          the_post_thumbnail('thumbnail');
        }
        ?>
        <h2><?php the_title(); ?></h2>
        <p><?php the_excerpt(); ?></p>
        <footer>
          <span><?php echo $categories_name; ?></span>
          <a href="<?php the_permalink(); ?>" class="btn btn-primary pull-right">Read more&hellip;</a>
        </footer>
      </div>
    </article>
  <?php
  endwhile; //endwhile
endif;
wp_reset_query();
wp_reset_postdata();
?>