(Security checkpoints) may be tightened.Logical formLearned from8 sentences. Some spacewalkers may tighten wires.Logical formLearned from8 sentences. A german government may tighten restrictions.Logical formLearned from8 sentences. Surveillance may tighten.Logical formLearned from8 sentences. Peacekeepers may tighten security.Logical formLearned from8 sentences. Security may tighten for an appearance.Logical formLearned from8 sentences. Tanks may tighten a cordon.Logical formLearned from8 sentences. An Israeli military may tighten (travel restrictions).Logical formLearned from8 sentences. (News organizations) may tighten (mailroom security).Logical formLearned from8 sentences. A result may tighten a situation.Logical formLearned from8 sentences. Police may tighten surveillance.Logical formLearned from8 sentences. Enforcement may be tightened.Logical formLearned from8 sentences. (Banking secrecy) may be tightened.Logical formLearned from8 sentences. (Borrowing rules) may be tightened.Logical formLearned from8 sentences. Forces may tighten a circle.Logical formLearned from8 sentences.