Givaudan may be the biggest multinational company you've never heard of, explains correspondent Morley Safer. It employees 9,000 people in 45 countries. Givaudan employees admit that they aim to mimic Mother Nature with chemicals. They create flavors that don't linger too long -- that way, you'll want to go back for more. "There's a lot of secrecy," confesses one employee. The company won't reveal which brands contain Givaudan flavors.