Police departments began using dogs in the 19th century for security and control, but it was not until the 1960s that dogs were used to detect illegal drugs. It is thought that Israel was the first country to do so, with France soon following. Military police used drug dogs during the Vietnam War to reduce drug smuggling into the United States. Today, it is common to see drug dogs being used in airports, schools and at traffic stops. Businesses are even using private companies that employ drug dogs and handlers to search employees' desks and lockers to find illegal substances.