Akaenderera mberi nokutsvakurudza nezvokusvibiswa kwemhepo, kwaakatanga achidzidziswa naDrinker, kusvikira asiya chikoro muna 1977.
Chokwadika, shanduro yakaoma zvikuru yemutsara wacho ndeiyi "Akaramba achitsvakurudza, kwakatangwa pasi paDrinker, pakusvibiswa kwemhepo kutozosvikira asiya chikoro muna 1977, achiva anofarira zvikuru basa resimbi mukufema sulfuric acid".