https://www.pbs.org/wgbh/pages/frontlin ... /wars.html https://www.pbs.org/wgbh/pages/frontlin ... /wars.html https://www.pbs.org/wgbh/pages/frontlin ... /wars.html in the mid-1980's https://www.pbs.org/wgbh/pages/frontlin ... /wars.html https://www.pbs.org/wgbh/pages/frontlin ... /wars.html DNA https://www.pbs.org/wgbh/pages/frontlin ... /wars.html