WASHINGTON, United States — A US military guard was seen loudly reprimanding Defense Secretary Pete Hegseth and his group on Veterans Day, after they laughed and chatted near a sacred tomb at Arlington National Cemetery.Video circulated widely on US networks and social media showed Hegseth and a group reportedly including his senior advisors gathering to take photos Wednesday at the Tomb of the Unknown Soldier, after a Veterans Day ceremony that featured President Donald Trump.'All visitors will maintain an atmosphere of silence and respect at all times!' a US Army sentinel yelled loudly, after laughter and chatter can be heard.The Tomb of the Unknown Soldier is a sacred burial ground of American soldiers who were killed during World War I, World War II and the war in Korea.....