A child is born and world population hits 7 billion

Erik De Castro / AP A newly born baby girl named Danica Camacho, one of a number of children chosen to be the world's symbolic seven billionth baby, lies on the chest of her mother Camille in Fabella Maternity hospital in Manila, Philippines,Monday. msnbc.com staff and news service reports updated 10/31/2011 5:50:20 AM ET 2011-10-31T09:50:20 Countries around the world marked the world's populati