Cole Campell is a freshman at St. Albans School in Washington, D.C. He recently spent a day with us at Fool HQ learning more about the stock market. He chose to focus on Under Armour (NYSE: UA) for the day and discussed it with our analysts and editors. Here he shares his unique perspective as a young investor watching an upstart company challenge an older, dominant brand.

With the European debt crisis and slowing growth in China, many investors are worried about heady growth going forward --  but fear not, because: The Future Is Made in America. Domestic manufacturing is poised to once again become the investment driver of the world, and all because of one disruptive technology. You can uncover the three companies that will become the American Steel of tomorrow in The Motley Fool's free report. Just click here to read more.

Sam Cicotello has no position in any stocks mentioned. The Motley Fool recommends Nike and Under Armour. The Motley Fool owns shares of Nike and Under Armour. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.