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: Iraq Peace Mission in Najaf; Baghdad Blast Kills 7  NAJAF, Iraq (Reuters) - Iraqi political and religious  leaders trying to end a radical Shi'ite uprising flew into  Najaf Tuesday, where U.S. troops and militia fought pitched  battles near the country's holiest Islamic sites.

World