weapon which could wipe out the civiliza tion built up over the centuries. W hile we do not claim to know, we would asumc that the March tests will in clude a hydrogen bomb detonation, with a careful check of results on both human and physical structures. Since Mr. Truman has estimated that hydrogen bombs will be able to devastate between three hundred and twelve hundred square miles, the new tests should prove more valuable than any since the first atomic tests in the Pacific.

60.8%