21. Carter said a " fire wall " exists between Campaign America and Quayle's presidential activities. 22. Now McAfee provides all kinds of security software including fire walls and network management tools. 23. The pilot elected to shut down the engine by turning off the fire wall shut off. 24. The network is protected by an electronic fire wall designed to block outsiders from gaining access. 25. "The fire walls have been set up " to protect against conflicts of interest, he said. 26. The Internet architecture is going to go back through the fire wall to define the enterprise. 27. Fire walls resist spread of fire within or sometimes between structures to provide passive fire protection.28. He said he plans to install a fire wall this month to keep such impostors out. 29. The standards commission typically deals with more mundane concerns, like plumbing pipes and fire wall widths. 30. We are creating a fire wall , a barrier,
