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: Northrop, BAE Systems win US government contract NEW YORK, August 26 (New Ratings) - The US government has reportedly selected Northrop Grumman Corporation (NOC.NYS) and BAE Systems Plc (BA) to develop systems for protecting commercial aircraft from shoulder-fired missiles.

Business