What’s the harm in buy­ing a knock-off purse or a fake design­er watch? Accord­ing to coun­ter­feit inves­ti­ga­tor Alas­tair Gray, fakes like these fund ter­ror­ism and orga­nized crime. Learn more about the tril­lion-dol­lar under­ground econ­o­my of coun­ter­feit­ing — from the crim­i­nal orga­ni­za­tions that run it to the child labor they use to pro­duce its goods — as well as mea­sures you can take to help stop it. “Let’s shine a light on the dark forces of coun­ter­feit­ing that are hid­ing in plain sight,” Gray says.