ABC's Whitney Lloyd reports from New York: Fort Hood – where 13 soldiers were killed and 34 more shot by a fellow soldier yesterday – is at the forefront of an Army experiment to combat the emotional assault of war on soldiers. Major Nidal Malki Hasan, an Army psychiatrist who had treated soldiers suffering from post-traumatic stress disorder, unleashed his own frustration and fear of an upcoming deployment to Afghanistan in a hail of bullets at Fort Hood – one of only two Army bases participating in a newly launched program to train soldiers in “emotional resiliency.” Opened just last...