A poster warning of the effects of the drug known as 'spice' hangs on a wall at the Naval Hospital in San Diego. The U.S. Navy has kicked out a record number of sailors and Marines this year for smoking synthetic marijuana and is seeing a dramatic jump in emergency room visits of its users, including some who babbled or hallucinated for eight days. (AP Photo/Gregory Bull)
Read the article: 'Synthetic' marijuana is problem for US military
