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: Car bombers kill seven in Iraq A double suicide car bomb attack has devastated a police station just outside Baghdad #39;s fortified Green Zone, killing seven people and wounding 57 in the latest strike against Iraq #39;s beleaguered security forces.

World