Mexican troops have killed a top drug leader. ignacio nacho koren nell helped create the country s powerful methamphetamine business. he died in a gun fight with soldiers in an upscale neighborhood of guadalajara. the fbi offered a $5 million award for his capture because his operation was smuggling so many drugs here into the u.s. a new report on army stress paints a bleak picture of suicides, drug use, and crime among its soldiers. it also says warning signs that military men and women are in trouble exist. here s martha raddatz. reporter: the toll of the wars has never been made more clear. with an army sometimes unprepared for the devastating impact on the health of the troops. just look at these figures. one-third of soldiers are now taking prescription drugs. antidepressants. anxiety medications and pain pills. amphetamine use has doubled since 2006. sexual offenses have tripled