At age 15, Michael Calce, aka 'MafiaBoy', launched massive cyberattacks in 2000, crippling major sites like Yahoo, eBay, and Amazon, causing $1.7 billion in damages. Raised in Montreal, he learned hacking young, joined an elite group, and used social engineering to gain access. Eventually caught, he served 8 months in youth detention. Today, Calce is a reformed hacker, cybersecurity entrepreneur, and advocate for internet safety.