title: A time of challenge to the health physicist.
mesh_terms: D000056:Accident Prevention; D004995:Ethics, Professional; D006283:Health Physics / Q000193:education / Q000592:standards; D006801:Humans; D009688:Nuclear Reactors; D009938:Organizations; D011364:Professional Practice; D011832:Radiation Injuries / Q000517:prevention & control*; D011835:Radiation Protection; D014481:United States