1.0WAMUhttps://wamu.orgadminhttps://wamu.org/author/admin/rich600338<blockquote class="wp-embedded-content" data-secret="D0mLPeLq2B"><a href="https://wamu.org/story/13/06/29/why_tchaikovskys_bells_and_cannons_sound_every_july_4/">Why Tchaikovsky’s Bells And Cannons Sound Every July 4</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://wamu.org/story/13/06/29/why_tchaikovskys_bells_and_cannons_sound_every_july_4/embed/#?secret=D0mLPeLq2B" width="600" height="338" title="“Why Tchaikovsky’s Bells And Cannons Sound Every July 4” — WAMU" data-secret="D0mLPeLq2B" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,d){"use strict";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),l=0;l<n.length;l++)n[l].style.display="none";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=d.createElement("a"),a=d.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> https://wamu.org/wp-content/uploads/2013/06/28/gettyimages_147818847_wide-24eb8fe98a262370f67dba42e77499aa416a950f.jpg29941683In the 1970s, the Boston Pops effectively turned the 1812 Overture into an Independence Day staple. The music director and executive producer of the orchestra's annual Fireworks Spectacular explain how and why.