The Conversation: Atlantic Rower Katie Spotz

22-year-old Katie Spotz has completed a monumental journey. She arrived in South America on Sunday after rowing solo across across the Atlantic Ocean.

Spotz is now the youngest person to have ever completed a solo transoceanic trip. It took her 70 days, 5 hours, and 22 minutes. Spotz spent 10 to 12 hours rowing every day, tracking her progress on Twitter using satellites.

What does it take to make it across the Atlantic? And what drives a 22-year-old from Ohio to make the journey? ABC's Diane Sawyer posed those questions and more to Spotz in today's Conversation.