300 million
Did you wake up Tuesday and feel a little claustrophobic? According to U.S. Census Bureau estimations, our population passed the 300 million mark Tuesday at 7:46 a.m. There wasn't a big fanfare for this milestone as there was in 1967 when we hit 200 million. At that time the achievement was overwhelmingly positive, a signal of our rise to global power. This time, census officials expected nothing more than cake and punch to commemorate the "populometer" rolling over to eight zeroes once again.

