To hide the scale of the operation, which had thousands of accounts, they devised a subset of 10-25 “special” accounts, which they presented as their full universe of business.

However, short of a full-scale military reinvasion similar to "Operation Defensive Shield" in the West Bank in 2002, it is hard to see what Israel could do.

Using 40kg of scrap iron, they ran a prototype experiment which showed that the method worked. Then the full-scale treatment facility came into operation.