A Nebraska teacher visiting Crater of Diamonds State Park in Arkansas found a 2.2-carat brown diamond, the largest diamond found at the park so far this year. Photo courtesy of Arkansas State Parks ========================================================== July 30 (UPI) -- A Nebraska man visiting Arkansas' Crater of Diamonds State Park found a 2.2-carat brown diamond, the largest found at the park so far this year. Josh Lanik, 36, a schoolteacher from Hebron, told Arkansas State Parks officials he was visiting the park with his family July 24 when he spotted something shiny on the surface of the ground. "We took the kids...