President Joe Biden marked Memorial Day with a pledge that the country would continue the work of the nation's fallen toward creating a more perfect union, "for which they lived, and for which they died for." Delivering remarks at a solemn remembrance ceremony at Arlington National Cemetery, Biden said each generation must ensure the sacrifice of the country's service members is not in vain. “Freedom has never been guaranteed,” Biden said under gray skies in the memorial amphitheater. “Every generation has to earn it, fight for it, defend it in the battle between autocracy and democracy, between the greed of a few, and the rights of many.” He added: “On this day, we came together again to reflect, to remember, and above all, to recommit to the future they fought for, a future grounded in freedom, democracy, opportunity and equality. Not just for some, but for all.” Before the ceremony began, Biden, joined by Vice President Kamala Harris and Defense Secretary Lloyd Austin, placed a wreath at the Tomb of the Unknown Soldier. In his remarks, Biden invoked the anniversary this week of the death of his son Beau, who served in Iraq and later died from brain cancer that the president attributes to his time stationed near toxic burn pits, to highlight the importance of honoring the service of those who came home with injuries, in addition to the dead. Read more: https://www.9news.com/article/news/nation-world/biden-memorial-day/507-73b17c0c-a72d-4ea8-b65d-6f78637674cb More local videos here: https://bit.ly/2Pa0d1l Subscribe to NEXT: http://bit.ly/2eP1GwI Stay connected: 9NEWS Website: http://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.