(concurring):
I think it important to emphasize that prejudice to an accused is presumed from the fact that a juror consulted “outside sources” for evidence bearing on the accused’s guilt. The burden is then on the Government to overcome the presumption. Remmer v United States, 350 US 377, 100 L ed 435, 76 S Ct 425 (1956); Feld, A Manual of Courts-Martial Practice and Appeal, § 92, page 104. In other respects, I agree fully with the principal opinion.