In National Treasure: Book of Secrets when Nicholas Cage and his buddy break into a house, it was mentioned that the best security system was a dog. That turned out to be spot on when a mountain lion popped into a San Juan Capistrano home to say, "hello, dear.". Authorities said the young cougar wandered into a San Juan Capistrano home Monday. Homeowner Jo Ann Merrell said she was watering her plants when she saw......