21.   Both groups used observations made with a satellite called the Rossi X-ray Timing Explorer, named for MIT astronomer Bruno Rossi, a pioneer of X-ray astronomy.

22.   Both groups used the Milky Way versions of the stars as the standard to judge the more distant ones.

23.   Both Lahey and Primary Care officials say their groups instead use education and peer pressure to try to get physicians to cut down on waste.

24.   - No terrorist group would use nuclear weapons because such an action would be self-defeating and would bring worldwide scorn.

25.   A group of people used to meet every Sunday night to talk about alternative rock music, and I never missed a week.

26.   A shyster group may use a name very similar to a well-known charity.

27.   Advocacy groups often use the threat of a ballot measure for political leverage.

28.   Bush objected to putting an end to the exemption for investment income of trade associations by noting that groups such as chambers of commerce use the funds for scholarships.

29.   But instead of writing letters and printing posters, the group uses art to press its point.

30.   But that group is using some strategies of the private sector.