Representative Christopher Shays, a Connecticut Republican who has led hearings on the vaccine's safety, said that fewer than 20,000 of the doses in the stockpile were clearly safe.

He has led several hearings on the abuses in recent years and plans more this year.

By forming a special committee, he held dozens of meetings with small enterprises and led hearings to narrow differences and find solutions.

In 1974, Senator Henry Jackson led highly charged Congressional hearings on the energy crisis.

He later led hearings which provided evidence that Haitian military officials were involved in drug trafficking to the United States.

Kefauver also led hearings that targeted indecent publications and pornography.

That connection, first suggested in intelligence reports and echoed by Senator Fred Thompson, the Tennessee Republican who led hearings on campaign finance, was never proved.

Later came an investigation by New York County Assistant District Attorney Joseph Stone that led to Grand Jury testimony and ultimately Congressional hearings in 1959.

Christopher Shays, a Republican, led hearings on how officials are responding to reports of sexual assaults in the service academies.

HALDE is entitled to lead various hearings as well as investigations; it can also send files to the procureur de la République.