1.   It is by now well known that about half of all violent crime is committed by and against blacks.

2.   But it is remarkable how little is still known about who is using the Web and how.

3.   But there are things I do not know about him, and that is how he wants it right now.

4.   Crime scene reconstructionists hold their national convention in Overland Park, Kan. Everything you ever wanted to know about how they figure out who killed whom with what.

5.   It is a powerful and cautionary tale, one that even Freeman did not know much about until he undertook the project.

6.   Morlin was witnessing what few Americans know about, much less see.

7.   Nothing certain is yet known about who planted the bombs that exploded on Friday.

8.   One of them has written that Reich has been in college all his life, has never used a screwdriver, knows nothing about working life.

9.   The only thing else that is known about it is that it concerns one day in the life of Gray and his family at their Long Island home.

10.   The researchers suggested that in any system where it was possible to know about a calculation error it might be possible to exploit this newly discovered vulnerability.