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: U.S. Jets Hit Iraq's Falluja, Fierce Ground Clashes  BAGHDAD (Reuters) - U.S. warplanes pounded the rebel-held  Iraqi city early on Monday as ground forces fought fierce  clashes with insurgents on the outskirts of the city, witnesses  said.

World