People power: U.S. to top 300 million

(CNN) -- At 7:46 ET Tuesday morning, the United States will become a nation of 300 million people, the U.S. Census Bureau estimates.Fueled by an estimated net gain of one person every 11 seconds, America -- already the world's third most populous country -- will join China and India with populations greater than 300 million.The main reason is simple: Births outnumber deaths. According to the Census Bureau, a child is born every seven seconds, but a death occurs every 13 seconds.

People power: U.S. to top 300 million - CNN.com