A parasitic fly that was eradicated from the United States in the 1960s has been slowly creeping back after being detected within 25 miles of the Texas-Mexico border, marking its closest approach to American soil to date.
U.S. Ag. Sec. Brooke Rollins speaks to the crowd on May 5 at Ex-Guard in Des Moines, Iowa.
A map of current cases of New World screwworm along the U.S.-Mexico border as of June 1.





