{"id":624870,"date":"2026-01-18T22:47:17","date_gmt":"2026-01-18T21:47:17","guid":{"rendered":"https:\/\/cronologia-universale.it\/march-1-1954-2\/"},"modified":"2026-01-18T22:47:17","modified_gmt":"2026-01-18T21:47:17","slug":"april-1947-2","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/april-1947-2\/","title":{"rendered":"April 1947"},"content":{"rendered":"<p>The assembly of the Mark-3 plutonium bomb dropped on Nagasaki was considered dangerous, and orders were given to never assemble a Mark-3 on American soil. In the event of conflict, they would be assembled at intermediate support bases such as Thule, in northwest Greenland. The Mark-3 was complicated and delicate. The trigger was a car battery, which took three days to charge and had to be recharged every week. This required completely disassembling the bomb, which had not been designed for this, and therefore required considerable time. By 1947, the United States had enough plutonium to assemble several dozen Mark-3s, but only one was operational and several were partially built.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The assembly of the Mark-3 plutonium bomb dropped on Nagasaki was considered dangerous, and orders&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"class_list":["post-624870","post","type-post","status-publish","format-standard","hentry","category-fq-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>April 1947 - Cronologia Universale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cronologia-universale.it\/en\/april-1947-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"April 1947 - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"The assembly of the Mark-3 plutonium bomb dropped on Nagasaki was considered dangerous, and orders...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cronologia-universale.it\/en\/april-1947-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Cronologia Universale\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-18T21:47:17+00:00\" \/>\n<meta name=\"author\" content=\"Rick\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rick\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cronologia-universale.it\/en\/april-1947-2\/\",\"url\":\"https:\/\/cronologia-universale.it\/en\/april-1947-2\/\",\"name\":\"April 1947 - Cronologia Universale\",\"isPartOf\":{\"@id\":\"https:\/\/cronologia-universale.it\/#website\"},\"datePublished\":\"2026-01-18T21:47:17+00:00\",\"author\":{\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03\"},\"breadcrumb\":{\"@id\":\"https:\/\/cronologia-universale.it\/en\/april-1947-2\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/cronologia-universale.it\/en\/april-1947-2\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/cronologia-universale.it\/en\/april-1947-2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/cronologia-universale.it\/en\/universal-cronology\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"April 1947\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/cronologia-universale.it\/#website\",\"url\":\"https:\/\/cronologia-universale.it\/\",\"name\":\"Cronologia Universale\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/cronologia-universale.it\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03\",\"name\":\"Rick\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g\",\"caption\":\"Rick\"},\"sameAs\":[\"http:\/\/cronologia-universale.it\"],\"url\":\"https:\/\/cronologia-universale.it\/en\/author\/rick\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"April 1947 - Cronologia Universale","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/cronologia-universale.it\/en\/april-1947-2\/","og_locale":"en_US","og_type":"article","og_title":"April 1947 - Cronologia Universale","og_description":"The assembly of the Mark-3 plutonium bomb dropped on Nagasaki was considered dangerous, and orders...","og_url":"https:\/\/cronologia-universale.it\/en\/april-1947-2\/","og_site_name":"Cronologia Universale","article_published_time":"2026-01-18T21:47:17+00:00","author":"Rick","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Rick","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/cronologia-universale.it\/en\/april-1947-2\/","url":"https:\/\/cronologia-universale.it\/en\/april-1947-2\/","name":"April 1947 - Cronologia Universale","isPartOf":{"@id":"https:\/\/cronologia-universale.it\/#website"},"datePublished":"2026-01-18T21:47:17+00:00","author":{"@id":"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03"},"breadcrumb":{"@id":"https:\/\/cronologia-universale.it\/en\/april-1947-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/cronologia-universale.it\/en\/april-1947-2\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/cronologia-universale.it\/en\/april-1947-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/cronologia-universale.it\/en\/universal-cronology\/"},{"@type":"ListItem","position":2,"name":"April 1947"}]},{"@type":"WebSite","@id":"https:\/\/cronologia-universale.it\/#website","url":"https:\/\/cronologia-universale.it\/","name":"Cronologia Universale","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/cronologia-universale.it\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03","name":"Rick","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/cronologia-universale.it\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g","caption":"Rick"},"sameAs":["http:\/\/cronologia-universale.it"],"url":"https:\/\/cronologia-universale.it\/en\/author\/rick\/"}]}},"_links":{"self":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts\/624870","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/comments?post=624870"}],"version-history":[{"count":2,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts\/624870\/revisions"}],"predecessor-version":[{"id":689999,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts\/624870\/revisions\/689999"}],"wp:attachment":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/media?parent=624870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/categories?post=624870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/tags?post=624870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}