Deteriorating weather conditions and night flying certainly pose challenges to find ways to make accurate judgments. Knowing the great expense of simply maintaining a helicopter 24/7 and staffing it much less investing in expensive equipment puts pressure on a hospital to make the helicopter pay. There are reports that medical helicopters have been called to transport injured persons who were really not appropriate because the person was discharged from the hospital shortly after being seen. Does this really happen and why do you think it might happen? Knowing that a helicopter is essentially a secondary responder, the question is clearly: are paramedics in the field trained to a level where they can make accurate assessments?