The headline used by CNN is grossly misleading. They are deriving the $4 additional cost by comparing the Moto X to an iPhone, and subtracting their estimated cost from each other.
"China also has far more skilled engineers than the United States does. Apple has said it requires 30,000 industrial engineers to support its on-site factory workers -- numbers that simply don't exist in America. "<p>Of course America doesn't have IE's, they stopped hiring those people in the US 30 years ago.
Bad headlines aside, its remarkable that its only $4 more expensive to make a phone in the USA! Why in the world aren't more electronics being made in the USA then? (Think quality control and product security, at least.)