A 72-year-old man used a handgun to fatally shoot a grizzly bear who pounced on him as he was picking huckleberries in Montana, according to authorities. The unidentified man reportedly suffered “significant injuries” in the attack Thursday by a female grizzly and was taken to a local hospital for treatment. His current condition was not revealed. He was alone in a section of Flathead National Forest two miled from the northwestern Montana town of Columbia Falls when the attack occurred, said Montana Fish, Wildlife & Parks officials. Officials believe the bear was likely reacting to protect cu…