When approaching a scene of trauma incident, what is your first order of business?

Scene safety must be the first order of business upon approaching the scene. If you are injured then you cannot help those you were called to help.  In addition, you will now compound the incident since you are now a victim.  Body substance isolation is important after you arrive at the scene and approach the patient (s).  Once you find the patient, then Airway/C-spine control are the next steps.