ocols.fb_image_width }}" />
  <meta property="og:image:height" content="{{ site.protocols.fb_image_height }}" />
  {% endif %}

  {% if site.protocols.twitter_image %}
  <!-- Twitter: card tags -->
  <meta name="twitter:card" content="summary">
  <meta name="twitter:title" content="{% if page.title %}{{ page.title }}{% else %}{{ site.title }}{% endif %}">
  <meta name="twitter:description" content="{% if page.excerpt %}{{ page.excerpt | strip_html | strip_newlines | truncate: 160 }}{% else %}{{ site.descrip