Two cast members and the production company of the Discovery Channel reality show "Alaska: The Last Frontier" have been charged with using a helicopter for a black bear hunt. A former production company employee tipped troopers off about the illegal hunt, Alaska State Troopers spokeswoman Megan Peters told the Alaska Dispatch News ( http://bit.ly/1KQHXmF ) on Tuesday. "When the footage came on, we saw it," Peters said. "We were able to investigate it after the fact." The heli