Since their arrival in San Diego aboard a Coast Guard cutter two weeks ago, the accused head of the Arellano Félix drug cartel and six other men have been held in small cells on the fifth floor of a downtown jail. They can't use the phone, they can't exercise and they've only been allowed out of their cells for lawyer visits, court and a 15-minute shower once every three days, their lawyers said. “They're being treated more harshly than some of the worst convicted criminals we've had in this country,” said David Bartick, lawyer for Francisco Javier Arellano Félix, accused...