(CNN) -- Niko Mushi hated rats, as did most people in his village near Tanzania's Mt. Kilimanjaro -- until he learned the critters had a nose for land mines. Mushi, 32, has been working with giant African pouched rats for almost seven years. He now enjoys their company -- "They're just like my friend," he says -- but he concedes he was skeptical when the man who conceived the idea for HeroRats first told him they could sniff out live ordnance. "I thought maybe he was making some jokes," Mushi said. "I was amazed that rats could do such a...