PERKINSTON, Miss. — In the embrace of a cheerfully chittering spider monkey named Louie, an Army veteran who grappled for decades with post-traumatic stress disorder says he finally feels at peace. “Being out here has brought a lot of faith back to me,” said John Richard. “There's no feeling like it.” The bond began last fall when Richard was helping two married veterans set up the Gulf Coast Primate Sanctuary, volunteering his time to build the enclosure that's now Louie's home in rural