Five people, including a firefighter, were injured Wednesday when a ladder “suddenly and rapidly” retracted, dropping 40 feet during a fund-raising event at a Green Valley fire station. The victims, who were in a bucket on the ladder, suffered fractures and bruises to heels, legs and an arm, and were transported to University Medical Center-Main Campus in Tucson, one by air. Two, including the firefighter, were released Thursday; at least two of the three still hospitalized underwent surgery Thursday morning.