Mu 1994, vashanu vasingazivikanwe vagari vekontrakta uye chirikadzi dzevashandi vekontrakta Walter Kasza naRobert Frost vakamhan'arira USAF neUnited States Environmental Protection Agency. Mhosva yavo, yavakamiririrwa naGeorge Washington University mutemo purofesa Jonathan Turley, vakapomera kuti vaivepo apo huwandu hwakawanda hwemakemikari asingazivikanwe hwakapiswa mumakomba akavhurika nemakomba paGroom. Biopsies dzakatorwa kubva kune vanonyunyuta dzakaongororwa neRutgers University biochemists, vakawana huwandu hwe dioxin, dibenzofuran, uye trichloroethylene mumafuta emuviri wavo. Vanyunyuta vakati vakange vaine ganda, chiropa, uye kukuvara kwekufema nekuda kwebasa ravo paGroom, uye izvi zvakakonzera kufa kwaKasza naFrost.
vakanga vakakuvadzwa ganda, chiropa, uye nzira yokufema