Tourism has been on of the rapidly growing sectors of the world economy. With increased globalization, tourism has recorded massive growth towards the end of the 20th century driven by development in most efficient modes of transport. From a small industry in the beginning of the 20th century, tourism industry has grown to a multibillion industry in one century to become an important pillar of world economy. Globalization and increased means of communication has led to increased urge to learn foreign cultures. Tourism has been important not only in the developed world but also in the developing world. However, one of the greatest threats to tourism in the world is terrorism. Before the September 11 attack, tourism was the largest industry in the world which accounted to one in every twelve jobs. The industry had grown to more than $3.6 trillion industry. However, the September 11 attack almost brought the industry to its knees and though there have been some progress, the effects remain to be felt all over the world. The ripple effect from the attack was felt beyond the United States to the rest of the world which exposed the vulnerability of tourism sector to security threats. Tourism is not only pegged on tourist attractions and the quality of services provided but it also depend on security assurance.