Bomb and arson threats in hospitals.
D003415:Crime; D005107:Explosions; D005390:Fires; D005843:Geography; D006276:Health Facility Size; D006739:Hospital Administration; D006761:Hospitals; D006801:Humans; D007603:Jurisprudence; D012621:Seasons; D013997:Time Factors; D014481:United States; D014754:Violence