21.   Because of lack of federal support, American scientists are forced to rely on industry funds for much of their research, he said.

22.   After considerable trial and error, American scientists figured out that they could obtain the same kind of explosive power from a smaller package.

23.   After that experience, American scientists and Guatemalan growers, working together, did everything they could to prevent another outbreak.

24.   But many American scientists are not pleased with the compromise.

25.   But last year, Nature published a paper by a large team of American scientists that cast doubt on that assertion.

26.   But such teamwork has been curtailed by recent espionage fears, which American scientists fault as exaggerating the risks of cooperation and ignoring benefits like the plutonium insight.

27.   By the next year, government investigators had identified a suspect, an American scientist at Los Alamos laboratory, where the atomic bomb was first developed.

28.   During his Center Watch days, Whitaker stumbled upon psychiatric research in which American scientists gave the mentally ill chemical agents intended to heighten their psychoses.

29.   Environmental pollution makes a big contribution to violent crime and anti-social behavior, according to a provocative new analysis by an American political scientist.

30.   He specifically declared that the creation of human embryos for research purposes, which some American scientists have begun doing, was an evil akin to euthanasia and infanticide.