While hundreds of Mexican soldiers are deserting the army to join drug trafficking gangs, California is facing the opposite problem: A growing number of gang members here have infiltrated the U.S. Armed Forces in order to receive military training. The numbers speak for themselves: In 2003 there were just 16 incidents of gang members in the U.S. Armed Forces, while in 2006 the total was 10,309, according to the study, "Gang-Related Activity in the U.S. Armed Forces Increasing," released in 2007 by the Federal Bureau of Investigation (FBI). Twenty-two official entities, including the Los Angeles Police Department, participated in the...