The Hyatt Regency Hotel in 1981, a building owned by Crown Center Redevelopment Corporation and the real estate arm of Hallmark, Kansas City, killed 114 others and injured more than 200 people. The hotel was known for its weekly tea dances and performances. The 120-foot-long skywalks connected the hotel’s north and south ends were designed to look like they were floating, giving partygoers an elevated view. The fourth-floor walkway fell 30 feet and slammed into the second-floor floor, which then collapsed. Mark Williams was trapped under the debris for nine and a half hours before being rescued. The company paid out $140 million in settlements and judgments, including the largest settlement of $12 million to Sally Firestone, who lost the use of her arms and legs. The disaster continues to be studied in classrooms and the effects of engineering failure.