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: Ivanov: Russia to Revamp Security, Seek Cooperation Russia will revamp its security forces and seek international cooperation to hunt militants in the wake of a school siege which killed more than 300 people nine days ago, Defense Minister Sergei Ivanov said Sunday.

World