Born in Boston, Mass.; reminiscences of relatives in medical profession; education: Boston College, Harvard Medical School, London School of Hygiene and Tropical Medicine, internship at Case Western Cleveland Metropolitan General Hospital, residency at Boston Children's Hospital; career: Epidemic Intelligence Service for Centers for Diseaswe Control [CDC], founded environmental epidemiology unit with CDC, director of epidemiology at National Institue for Occupational Safety and Health, at Mt. Sinai Hospital since 1985; September 11th: activities at Mt. Sinai, family; invovement in reponse: aid to firefighters, police, contruction workers; air quality: air sampling, materials in air, respirators, asbestos, benzene, dioxin, pH levels, response of Environmental Protection Agency [EPA], health risks to workers/residents near site, treatment to exposure; dealings with Occupational Safety and Health Administration, Federal Emergency Management Agency, EPA; overview of studies conducted by Mt. Sinai after 9/11: goals, coordination, logistics, epidemiology, psychological, Post-Traumatic Stress Disorder [PTSD], pregnant women, babies, children, intrauterine growth restriction, workers at site, findings of studies; PTSD: problems diagnosing, studies, at-risk groups, treatment, workers at site, pregnant women; response from politicians; children and 9/11: displacement from schools, responses from, families of, PTSD, environmental health of, plans for National Children's Study.