A billion flies are now in the screwworm fight. Will there be enough?

A billion flies are now in the screwworm fight. Will there be enough?

By Jen Christensen, CNN (CNN) — A lot is riding on the shiny green backs of large red-eyed sterile flies that scientists from the United States, Mexico and Panama have been raising.The US government just released its billionth fly into Texas from a facility that opened in June in Chiapas, Mexico, near the Guatemalan border, and its sister operation in Panama in order to fight a pest that could potentially cause $2.5 billion dollars in damage in …