Poet and historian turns to films. Carl Sandburg is shown here as he was writing the commentary for "Bomber," nation defense motion picture just completed by the Office of Emergency Management (OEM) film unit. Mr. Sandburg is famous as the Pulitizer prize winning author of "The War Years", monumental biography on Abraham Lincoln, and as the author of numerous poems and other works. Mr, Sandburg is also famous as a musician, newspaper columnist and authority on Americans. The commentary for "Bomber" was his first excursion into film making. He volunteered his services to the defense program and served without pay