BISMARCK, N.D. – "Requiem for 9/11" will be performed by Dakota Pro Musica Sept. 12, 2 p.m., at the North Dakota Heritage Center & State Museum in Bismarck. This 20th anniversary commemorative concert will feature three compositions: Hollis Thoms’ “Requiem for 9/11,” Edward Elgar’s “Serenade for Strings,” and Samuel Barber’s famous “Adagio for Strings.” The three pieces ...