1.   In some cases, gas tanks are filled with drugs, then sealed off with a double wall of steel to prevent detection.

2.   The retaliatory air attack destroyed one target -- the anti-tank weapon -- but heavy cloud cover prevented detection of the other weapons.

3.   Cotino said the explosives may have been wrapped in something that prevented detection by sniffer dogs.

4.   He had undergone drastic plastic surgery to prevent detection.

5.   IRNA said that in one instance, the drug traffickers swallowed opium to try to prevent its detection.

6.   Several men who took part in the executions have said two sets of remains were separated from the others, burned and then scattered to prevent detection.

7.   The report said that Iraq last week admitted to loading proscribed missile parts, tools and moulds onto trucks in an attempt to prevent detection by the inspectors.