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 Forces Pound Falluja Before Offensive  NEAR FALLUJA, Iraq (Reuters) - U.S. troops unleashed a  fierce barrage of shelling on Monday on Iraq's rebel-held town  of Falluja, where U.S. troops are poised for a major offensive,  a Reuters witness said.

World