a group of people walking down the street: President Biden and Vice President Harris visited Arlington National Cemetery to pay their respects at the Tomb of the Unknown Soldier.   They were joined by former US presidents Barack Obama, George W Bush and Bill Clinton in a display of bipartisan unity.  The Tomb of the Unknown Soldier is a monument honouring all fallen US military whose remains were never identified.  SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews   Follow us on Twitter: https://twitter.com/skynews    Like us on Facebook: https://www.facebook.com/skynews   Follow us on Instagram: https://www.instagram.com/skynews   For more content go to http://news.sky.com and download our apps:    Apple: https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8   Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB  Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí https://www.youtube.com/skynewsespanol
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