On May 22, 2011, an EF5 multiple-vortex, 1-mile-wide tornado struck Joplin, Mo., killing 161 people and injuring about 1,100 others. Of the people killed in the storm, five of them were either patients or visitors of Mercy Hospital, which sustained a direct hit. The hospital itself, which was one of only two in the city, was a total loss. All photos courtesy Mercy Hospital. Read the full case study on how the hospital is rebuilding.