"A well-trained dog and a very good, well-trained handler can find explosives with little or no false alarms, " Beltz said.

CNN: Are dogs the key to bomb detection at airports?

Some of the silent actors were theatre- or vaudeville-trained, some were just good-looking people who were drawn to Hollywood, and did what they were told to do or imagined that they needed to do.

NEWYORKER: The Artists

Mainly, they require relentless attention to detail: good products, prompt service, well-trained staff with the power to do a little extra when they judge it right to do so.

ECONOMIST: Managing customers

However, surgeons must be well-trained in the principles of the operation, and good follow-up care is essential so the surgery won't fail.

CNN: A fate worse than death for scores of African women

Although properly-raised pit bull terriers can make good pets, according to reputable Georgia breeder Tara Vickers, fighting dogs - having been trained to attack other animals - are impossible to re-house safely.

BBC: NEWS | Americas | Brutal culture of US dog fighting

If you are still not convinced of the folly of our policymakers' objections, consider this: As our U.S. athletes march around the track at London's Olympic stadium wearing their Chinese-made uniforms and waving their Chinese-made American flags, there is a good chance that Chinese athletes will have arrived in London by U.S.-made aircraft, been trained on U.S.-designed and -engineered equipment, wearing U.S.-designed and -engineered footwear, many having perfected their skills using U.S.-created technology.

CNN: Why NOT make Olympic uniforms in China?