1.   Corporations will boost their purchases when existing stocks of equipment become obsolete and when there are good prospects that new gear will make money for corporate buyers.

2.   Each of the helicopters that crashed had gears made with a metal that investigators suspect may contain a potentially deadly flaw.

3.   The helicopters had gears made with a metal that investigators from the Justice Department suspect may contain a potentially deadly flaw.

4.   The head gear makes it difficult to see.

5.   The gears made more noise than a thumping disco.

6.   Tom Kent, a deputy managing editor of The Associated Press, said the expensive electronic gear could also make journalists vulnerable.