1.   No one knows the exact number of militias because of their clandestine nature.

2.   Part of the reason for its clandestine nature, he says, is the illegal gambling that surrounds it.

3.   The clandestine nature of street racing makes it hard to determine how often racers get killed.

4.   The clandestine nature of the IRA makes it difficult to estimate the amount of its weaponry with accuracy.

5.   The extent of illicit drug use inside prison has been far more difficult to measure because of its clandestine nature.

6.   This is coldhearted policy, legitimized only by the clandestine nature and virulence of the threat facing this country.

7.   True to the clandestine nature of their war-time duty, Oliver and Palmer were closemouthed about their military experience for years.

8.   Fellow Guerrero senator, Porfirio Camareno Castro, opined that the clandestine nature of the armed EPR demands a permanent military presence in the region.

9.   The clandestine nature of the trip was indicative of the lengths to which Taiwan must go to break out of the diplomatic blockade imposed by its rival, China.

10.   Speaking Tuesday evening, he said the ban on the organisation had achieved nothing and the clandestine nature of the organisation prevented police from infiltrating it.