taxcat
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'agenda_event_categories', 'terms' => array( 'cat-1', 'cat-2' ), 'field' => 'slug', 'operator' => 'IN', ), );
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'agenda_event_categories', 'terms' => array( 'cat-1', 'cat-2' ), 'field' => 'slug', 'operator' => 'IN', ), );