The Ford Explorer has won top federal crash-test scores for front and side impact - the first time it has done so in both categories at the same time. The newly-achieved 5-star rating in frontal crashes means passengers' chances of serious injury in a head-on collision at 35 mph are 10 percent or lower. Albert King, chair of the Department of Biomedical Engineering at WSU, said the Explorer gained a star on its frontal crash rating and its improvement was dramatic. "It's down to the range where you only have to worry about mild concussions," he said.