Guam’s Environmental Protection Agency has been ordered to test sites around the tiny U.S. island territory for traces of the toxic Vietnam-era defoliant Agent Orange. In a letter dated Jan. 19, Gov. Eddie Calvo instructed the agency’s on-island administrator, Walter Leon Guerrero, to examine “drinking water sources and soils,” where U.S. military veterans who served there in the 1960s and ’70s claimed the toxic-chemical mixture had been sprayed.