Blood Diamonds, also known as "Conflict Diamonds", are stones produced in areas controlled by rebel forces that are opposed to internationally recognized governments. The rebels sell these diamonds, and the money is used to purchase arms for their military actions. Blood Diamonds are often produced through the forced labor of men, women and children __1__ they are commonly stolen during shipment or seized by attacking operations of legitimate producers. The stones are then smuggled into the International diamond trade and __2__ as legitimate gems. Enormous amounts of money are at stake and bribes, threats, torture, and murder are modes of operation. This is why the term "blood diamonds" is used. The United Nations and other groups are working to block the entry of conflict diamonds into the __3__ diamond trade. Their approach has been to develop a government __4__ procedure known as the Kimberly Process. This procedure requires each nation to certify that all rough diamond exports are produced through legitimate mining and sales activity. All rough diamonds exported from these nations are to be accompanied by certificates. Retail customers buying a cut diamond are encouraged to insist upon a sales receipt which documents that their diamond is from a conflict free source.