Mark Zuckerberg appeared before the European Parliament on May 22 to testify about Facebook's impact on society, from data privacy to elections. Though Zuckerberg faced tough questions from members of Parliament, the format allowed him to escape easily. Here are the key questions Zuckerberg left unanswered. Subscribe: https://goo.gl/G5RXGs Check out our full video catalog: https://goo.gl/lfcGfq Visit our playlists: https://goo.gl/94XbKx Like The Verge on Facebook: https://goo.gl/2P1aGc Follow on Twitter: https://goo.gl/XTWX61 Follow on Instagram: https://goo.gl/7ZeLvX Read More: http://www.theverge.com/