Workers may monitor movements of an (air marshal).Logical formLearned from4 sentences. An (air marshal) can be in the sky.Logical formLearned from4 sentences. An (air marshal) may be tackled.Logical formLearned from4 sentences. (Air marshals) may be recruited in 1970s.Logical formLearned from4 sentences. Some (air marshals) may pose as terrorists.Logical formLearned from4 sentences. (Air marshals) may identify themselves.Logical formLearned from4 sentences. Marshals may make a difference.Logical formLearned from4 sentences. An (air marshal) may undergo movements.Logical formLearned from4 sentences. (Air marshals) can be on staff.Logical formLearned from4 sentences. Marshals can be permanent.Logical formLearned from4 sentences. A bill may place federal marshals on commercial flights.Logical formLearned from4 sentences. Marshals can be on airplanes.Logical formLearned from4 sentences. A marshal can be in a history.Logical formLearned from4 sentences. A female may debute as a marshal.Logical formLearned from4 sentences. Marshals may act.Logical formLearned from4 sentences.