Medical marijuana users risk job loss

When a rare form of cancer invaded Joseph Casias' nasal cavity and his brain, his doctor prescribed marijuana to help alleviate the daily pain.

But his employer, Wal-Mart, the nation's largest retailer, fired him in November 2009 after he failed a drug test. Casias, 29, says he never came to work high. He's got a medical marijuana card to prove...

Source:
http://www.cnn.com/2010/LIVING/03/24/michigan.medical.marijuana.fired/index.html?hpt=T2