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: US-Vietnam flight launched United Airlines (UA) on Thursday launched the first daily flight service to Vietnam from the United States since 1975. The flight represents the first such service by an American air carrier since the end 

Business