Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Global aviation security in a confusing mess: IATA Geneva, Dec 16 (UNI) Three years and three months after September 11 terror attacks in the United States, aviation security worldwide remains a confusing mess.

Business