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: Zarqawi Movement Vows al-Qaida Allegiance BAGHDAD, Iraq - The most feared militant group in Iraq, the movement of terror mastermind Abu Musab al-Zarqawi, declared its allegiance to Osama bin Laden on Sunday, saying it had resolved a dispute with al-Qaida over strategy and vowing unity against "the enemies of Islam."   The question of al-Zarqawi's relationship to bin Laden and the al-Qaida leadership has been the subject of considerable speculation. Some experts believed al-Zarqawi - who has claimed to be leading a bloody campaign of bombings against U.S...

World