Rubuta ci gaba don wannan sakin layi - Daga 1980 zuwa 1990, Preston ya kasance mai ba da rahoto game da rikice-rikicen makamai a Amurka ta Tsakiya, ciki har da yakin basasa a El Salvador
da kuma tawayen da Amurka ta goyi baya, kan gwamnatin Sandinista a Nicaragua. Ta ba da rahoto game da Amurka ta Tsakiya don The Boston Globe daga 1983 zuwa 1985 da kuma The Washington Post daga 1985 zuwa 1990.