The building was home to The Oxford Center, a health clinic that provided hyperbaric oxygen therapy to treat a variety of disorders. Before the explosion that killed Thomas Cooper, Michigan state Sen. Stephanie Chang had never heard of hyperbaric oxygen therapy. Hyperbaric oxygen therapy has found a support network inside Kennedy’s Make America Healthy Again movement, among wellness influencers and anti-aging gurus. In hyperbaric oxygen therapy, also known as HBOT, patients rest inside a special chamber where they breathe pure oxygen. The soft-side chambers provide so-called mild hyperbaric oxygen therapy at lower pressure and aren’t considered medical devices like hard-shell chambers.