gistfile1.txt

{exp:nsm_category_heading
    cat_url_title="{segment_2}"
    channel="news"
}
    {if no_results}{redirect="404"}{/if}

    {if not_ajax}
    {embed="site/_header"
        title="{category_name_path}"
        description="{category_description}"
    }
    {/if}

    <h1>{category_name}</h1>

    {embed="news/_entries"
        category_id="{category_id}"
    }

    {if not_ajax}
    {embed="site/_footer"}
    {/if}

{/exp:nsm_category_heading}