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: Report: U.S. cybersecurity chief resigns WASHINGTON - The head of cybersecurity efforts at the U.S. Department of Homeland Security (DHS) has reportedly resigned this week, leaving his job after giving a one-day notice.

Sci/Tech