SIERRA VISTA — Fear is keeping Pvt. Kyle Lawson awake at night — not of the enemy, but of his fellow soldiers. For weeks, the 19-year-old Tucson native has been sleeping on a cot in his drill sergeant's office to protect him from further attacks because he is gay. He's already had his nose broken — and says he also was threatened with a knife — after a friend let Lawson's secret slip at a party attended by members of the 309th Military Intelligence Battalion, a training unit at Fort Huachuca 75 miles southeast of Tucson. Lawson now feels he...