America's Population Set to Top 300 Million Immigration Fuels Much of Growth By Blaine Harden Washington Post Staff Writer Thursday, October 12, 2006; Page A01 Clicking upward at a rate of one person every 11 seconds, the U.S. population will officially surpass 300 million in the next week or so. http://www.washingtonpost.com/wp-dyn/content/article/2006/10/11/AR2006101101730.html?referrer