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: Militants Roam Parts of Iraq's Mosul, City Tense  MOSUL, Iraq (Reuters) - Groups of insurgents patrolled  streets in some districts of Mosul on Saturday, but U.S. and  Iraqi forces bolstered their presence to try to wrest back full  control of Iraq's third largest city.

World