{"version":"1.0","provider_name":"Air Force TImes","provider_url":"https:\/\/one.sightlinemg.com\/airforcetimes","author_name":"migration","author_url":"https:\/\/one.sightlinemg.com\/airforcetimes\/author\/migration\/","title":"Today in history: April 21","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"nVH7MbMYie\"><a href=\"https:\/\/one.sightlinemg.com\/airforcetimes\/news\/your-air-force\/2017\/04\/21\/today-in-history-april-21\/\">Today in history: April 21<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/one.sightlinemg.com\/airforcetimes\/news\/your-air-force\/2017\/04\/21\/today-in-history-april-21\/embed\/#?secret=nVH7MbMYie\" width=\"600\" height=\"338\" title=\"&#8220;Today in history: April 21&#8221; &#8212; Air Force TImes\" data-secret=\"nVH7MbMYie\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\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:\/\/one.sightlinemg.com\/airforcetimes\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/the-alamo.jpg.jpg?w=600","thumbnail_width":600,"thumbnail_height":441,"description":"\"Remember the Alamo\" exclaimed by Sam Houston at the Battle of San Jacinto, as well as arguably the beginning and end of military involvement in Vietnam on the same day, 21 years apart."}