Though his projects take years to make, Ken Burns says he’s always confident that they’ll be “echoing in the present” upon their release. So it will be with the three- part “The U.S. and the Holocaust” (PBS, 8 p.m., check local listings) that begins tonight and continues Tuesday and Wednesday (it was originally going to air Monday and Tuesday, but will be bumped by planned coverage of the Queen’s funeral Monday). The series, which Burns made with Lynn Novice and Sarah Botstein, takes a hard look at the United States’ shaky response to the Holocaust and its victims and will...