21.   The child protection system, with many social workers who are themselves immigrants, has not had an easy time resolving some cultural differences.

22.   The good news for Manhattanites is that modern high-rise buildings have built-in lightning protection systems.

23.   The fate of such children, lost in the cracks of the child protection system, has long been linked to the chronic chaos in the Child Welfare Administration.

24.   The train protection system was built into the light rail system in St. Louis and on the one that will open next year in Dallas.

25.   These are a self-contained version of the home protection systems sold by protection agencies, which alert a central office, which in turn dispatches security patrols.

26.   There were patchwork efforts to shore up weak points and a lightning protection system was installed.

27.   This is a major issue, since the shuttle could burn up if its thermal protection systems break down.

28.   This prompted ATR to modify the ice protection system on the wing.

29.   Tyco International, a maker of fire protection systems,

30.   Underwriters Laboratories recommends that even if a home comes with a lightning protection system, the new owner have it inspected to ensure installation was done properly.