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 Air Unions Object to Plan for Cuts  WASHINGTON (Reuters) - Big labor unions at bankrupt US  Airways Group Inc. &lt;A HREF="[Link] target=/stocks/quickinfo/fullquote"&gt;UAIRQ.OB&lt;/A&gt; claimed on Tuesday the carrier  has fallen far short of proving that it must have immediate  court-imposed wage and other cuts to survive.

Business