{"version":"1.0","provider_name":"National History Day","provider_url":"https:\/\/nhd.org\/zh","author_name":"Amanda NHD","title":"National History Day Celebrates 90 Student Projects Selected for Historical Research Showcases at Cultural Institutions in Washington, D.C. - National History Day","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"hFfWAFmVws\"><a href=\"https:\/\/nhd.org\/zh\/2025\/06\/04\/nhd-showcases-2025\/\">National History Day \u5e86\u795d 90 \u4e2a\u5b66\u751f\u9879\u76ee\u5165\u9009\u534e\u76db\u987f\u7279\u533a\u6587\u5316\u673a\u6784\u7684\u5386\u53f2\u7814\u7a76\u5c55<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/nhd.org\/zh\/2025\/06\/04\/nhd-showcases-2025\/embed\/#?secret=hFfWAFmVws\" width=\"600\" height=\"338\" title=\"\u300aNational History Day \u5e86\u795d 90 \u4e2a\u5b66\u751f\u9879\u76ee\u5165\u9009\u534e\u76db\u987f\u7279\u533a\u6587\u5316\u673a\u6784\u5386\u53f2\u7814\u7a76\u5c55\u300b\u2014National History Day\" data-secret=\"hFfWAFmVws\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/nhd.org\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>","thumbnail_url":"https:\/\/nhd.org\/wp-content\/uploads\/2025\/06\/Day-4-21-scaled.jpg","thumbnail_width":2560,"thumbnail_height":1703,"description":"COLLEGE PARK, MD \u2013 June 4, 2025 \u2013 National History Day\u00ae (NHD) is proud to announce a slate of student showcases at cultural institutions in Washington, D.C., during its 2025 &hellip;"}