FRESNO – Two homeless men in Fresno have called for an ambulance an average of nearly twice a day for more than a year, racking up hundreds of thousands of dollars in costs – and even more when they get to a hospital. They are Fresno County's highest-volume ambulance users – "frequent fliers" as they are called in the business – and their 1,363 combined trips made up 1.34 percent of all American Ambulance calls in the county last year. "I call all the time," Cesar Arana, 41, said while sitting on a bus-stop bench downtown. "I have a major...