{"type":"rich","version":"1.0","title":"First fully contained underground nuclear test - September 19, 1957","author_name":"This Day in History Class","author_url":"https://www.iheart.com/podcast/105-this-day-in-history-class-29520957/","provider_name":"Omny Studio","provider_url":"https://omny.fm","html":"<iframe src=\"https://omny.fm/shows/this-day-in-history-class/first-fully-contained-underground-nuclear-test-sep/embed\" width=\"100%\" height=\"180\" allow=\"autoplay; clipboard-write; fullscreen\" allowfullscreen frameborder=\"0\" title=\"First fully contained underground nuclear test - September 19, 1957\"></iframe>","width":600,"height":180}