Four people were killed and a fifth passenger was critically injured in a hot air balloon crash nearly halfway between Tucson and Phoenix. Police in Eloy, Ariz., said on Facebook “a hot air balloon crash-landed in the desert area east of Sunshine Blvd.,” Sunday morning shortly before 8 a.m. “The cause of the crash is currently unknown,” the police department said. Local authorities are working with the National Transportation Safety Board and Federal Aviation Administration to investigate the incident. According to ABC News in Arizona, officials said the ill-fated balloon carried four passenge…