As early as 1950, there were indications that the Army's experiments might be causing harm.

Other experiments to determine the causes for disease, in which research animals are deliberately infected, have also caused concern.

The experiments caused concern at the White House, which learned about the project after it was under way.

Experts however deny that the experiments could have caused the accident.

This experiment caused considerable damage to the community.

Whether the experiment has caused ticket prices to go down or up is not likely to be clear before lawmakers act.

"The 40-year experiment with with Communist political system caused a devastation which is almost impossible to clean up," he said.

"The earliest experiments did cause some nerve damage," Karlstad said.

Last year, a failed experiment to move him to tackle caused him to gain weight and lose confidence.

It is widely acknowledged that the experiment did not cause any environmental damage.