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: US troops aiding Darfur deployment KIGALI -- Three US Air Force cargo planes and 120 US troops landed in Rwanda yesterday to transport Rwandan soldiers and equipment to Darfur as part of an expanded African Union peacekeeping mission in the violent region. Several dozen soldiers unloaded boxes full of rifles and handguns on the tarmac of Kigali airport on the outskirts of the capital. (Reuters)

World