Extracting venom from snakes, scorpions and other venomous animals has become a lucrative business. The number of companies producing venom for antidotes has dropped and the demand has risen, according to market research groups. Two businessmen in Herat, Afghanistan, have opened a venom extraction laboratory in a nation that is home to 27 species of snakes and an unknown number of scorpion species. Khalil Noorzai has more in this report narrated by Bezhan Hamdard.