Not a few. The vast majority. Most of the landmines in Cambodia were laid between 1979 and 1991.

It is estimated that there are 4-6 million, maybe up to 10 million, live landmines still buried in Cambodia.

Since 1993, the United States has provided approximately $1 billion for reducing the threat posed by land mines left in the ground after conflicts end. That figure represents between one-third and one-half of all the money invested worldwide on mine action by donor nations, according to the State Department.

In 2002, the American Red Cross produced 710 prostheses, and distributed 703 orthesis, 202 wheelchairs and 1,056 walking aids for landmine victims in Cambodia.

In 2006, The US pledged nearly $1.9 million to support landmine clearing programs in Nicaragua, Honduras and Chile.

Is the manufacturer and their country, cleared of any moral responsibility for possible use of the mines, once the sale is completed?

If they are not, what do you propose their responsibility should be and how should that be enforced?