The USA has a long history of human experimentation from the beginning of the 20th century.

The USA has a long history of human experimentation from the beginning of the 20th century.: "'The United States has a long history of experimentation,
on unwitting human subjects, which goes back to the
beginning of this century. Both private firms and the military
have used unknowing human populations to test various
theories. However, the extent to which human experimentation
has been a part of the U.S. Biological Weapons programs will
probably never be known. The following examples are taken
from information declassified in 1977, and from other private
source accounts. Several involve incidents which are still
of unknown origins and which cannot be fully explained.'"