The police are said to use two methods to infiltrate an organization: They either recruit people from within the group, or they turn old members into informers by the use of torture, blackmail or bribery. The way to counter these methods is through secrecy, on three levels. a) Personal Militants should conceal their activities from everyone around them, including family members. They should not reveal their real names, addresses or jobs to others in the group. If two group members know each other they should belong to the same nucleus, so that if one is arrested and gives anything away, it will not lead to the discovery of another nucleus. b) Organizational One nucleus should not be aware of another and if any contact between them is necessary, this should be via the leader of the zone or the region. The members of one nucleus should not know how many other nuclei there are in their town, or where they are. «Technical» teams must be isolated from the rest of the organization and report directly to headquarters. Regional and zonal leaders should not know each other and contacts between them should be via headquarters. The organizational structure should be as follows: Headquarters, Regional leaders, Nuclei, Explosives, Weapons, Information. c) Operational If the leader of a nucleus receives an order to sabotage a business in his district, he should examine the target and divide and assign the work to members of the nucleus without revealing the target. The members do not know each others’ jobs and do not discuss their work. Once the leader has collected information, such as opening hours, entrances, security guards, he confirms it, plans the operation and requests material, such as explosives, from his immediate superior. These are only delivered a few hours before the operation. Then the members of the group meet and are shown the plan, but not the date or time until the operation begins. Some members of the nucleus may have sympathetic, discreet relatives or friends willing to provide safe houses, and these should be considered, since they may be rent-free and the occupants could provide a cover in the event of a police raid. The only thing to be confirmed in this case is the discretion of the people involved.