Once again today, President Obama insisted that infrastructure, especially high-speed rail, will be essential to getting the US economy back on track. But an essential part of America's transportation infrastructure, the San Francisco-Oakland Bay Bridge, is already being rebuilt by Chinese workers using Chinese technology. In a Shanghai manufacturing complex, workers are assembling two dozen giant steel modules, each with a roadbed segment half the size of a football field. Giant ships then take them 6500 miles to California, where American workers fit them into the eastern span of the new bridge. Can the US compete on US soil and in the rest of the world?