Antidepressant medications appear to help only very severely depressed people and work no better than placebos in many patients, British researchers said.

The researchers found that compared with placebo, these new-generation antidepressant medications did not yield clinically significant improvements in depression in patients who initially had moderate or even very severe depression. The study found that significant benefits occurred only in the most severely depressed patients.

Ex-EPA chief Christie Whitman was bombarded by boos and a host of accusations Monday at a hearing into her assurances that it had been safe to breathe the air around the fallen World Trade Center.

The confrontation between the former head of the Environmental Protection Agency and her critics grew heated at times. Some members of the audience shouted in anger, only to be gaveled down by Rep. Jerrold Nadler, D-N.Y., who chaired the hearing.

For three hours Whitman faced charges from Nadler and others that the Environmental Protection Agency’s public statements after the Sept. 11, 2001, attacks gave people a false sense of safety.