In 2005, Allen was living in Provence, France, when she heard the news that Hurricane Katrina was destroying her beloved hometown. Every morning, she watched CNN International and "cried her eyes out.

Lower 9 residents hope deteriorating Katrina memorial will be replaced before 20th anniversary Aug. 29 marks 20 years since Hurricane Katrina devastated our city. Two decades later, and a memorial ...

Can nanotechnology solve our battery production problem? This video examines the challenges involved in lithium extraction ...