The major points of dispute are whether the bulldozer operator saw Corrie and whether her injuries were caused by being crushed under the blade or by the mound of debris the bulldozer was pushing. An IDF spokesman has acknowledged that Israeli army regulations normally require that the operators of the armored personnel carriers (APCs) that accompany bulldozers are responsible for directing the operators towards their targets because the Caterpillar D9 bulldozers have a restricted field of vision with several blind spots.