Carlos Arredondo, who has been seen in a now-infamous (warning: graphic content) photo pinching a victim’s femoral artery while escorting him in a wheelchair to an ambulance, shakes uncontrollably as he describes in the video below what the bomb site looked like immediately after the explosion - and what he did to help and comfort the victims. The most heart-wrenching part is when he tells of the woman that he saw suffering, but was unable to assist because he could “only help only one at a time.”