But if history is any guide, foreign policy as a political-science field experiment or what-me-worryism will yield some ugly results.

WSJ: Eliot Cohen: American Withdrawal and World Disorder

But it was not regarded as a great success by the players - and the experiment was dropped after one season after no decisions made by on-field umpires were reversed.

BBC: Referrals change for England tour

When set to Manual, consumers can experiment with features such as slower shutter speeds, depth-of-field and even focus.

ENGADGET: Samsung's PMA gifts: HD pocket camcorders, point-and-shoots with AMOLED screens