category2
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'post_tag', 'terms' => 'special', 'operator' => 'AND', ), );
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'post_tag', 'terms' => 'special', 'operator' => 'AND', ), );