Nbc Nightly News

Luis von Ahn is the genius behind CAPTCHA and reCAPTCHA, which was sold to Google in 2009, and also the founder and CEO of Duolingo, the world's most popular language-learning platform. Born and raised in Guatemala, von Ahn saw firsthand that high-quality educational opportunities were limited to those who could afford it. Inspired to fix this, he created Duolingo to make language education free and accessible to everyone. von Ahn says he’s achieved his American Dream and is now working toward making an impact on worldwide education.