President Joe Biden recalled the loss nine years ago of his eldest son Beau during his Memorial Day address at Arlington National Cemetery. Acknowledging that his grief was not the same as that of families who lost loved ones during the course of their military service, Joe Biden told those in the audience that he understood “how hard it can be to reopen that black hole in the middle of your chest” whenever they remember them. “As it is for so many of you, the pain of his loss is with me...