In recent years, there has been a massive increase in the number of people who engage in international travel. Many factors are responsible for this phenomenon. For example, with the advent of low cost airlines, the cost of air traveling has come down. This has encouraged more and more people to spend their vacations in exotic foreign destinations. The growth in international trade opportunities is also prompting more and more people to travel. If the world economy continues to grow at this pace, this trend is going to continue.