Arizona Republic:  “Across Arizona, employers and workers are settling into an uneasy relationship with medical marijuana. While a 2010 voter-approved law forbids employers from discriminating against medical-marijuana patients, the law provides no protection for employees who are impaired at work.  And a 2011 law gave some businesses additional authority to penalize workers if they are believed to be impaired at work.  Still, employers across Arizona are grappling with how to handle workers who are now legally permitted to use marijuana.”