Rick Carrier was barely out of his teen years when he helped save tens of thousands of lives. If there is anyone fit to be called a hero, it's him – and a very unassuming one at that.
Carrier was the first American to stumble across the Nazi-run Buchenwald concentration camp in Germany on April 10, 1945. It was his twentieth birthday. The next day he returned with reinforcements, and helped liberate Buchenwald.
At 90 years old, the World War II veteran's recollection of the sights, smells and emotions at the very moment he helped liberate the camp are just incredible.
Listen as he shares his story with Kristie Lu Stout.
For millions of people in developing countries, smartphones represent their chance to experience the Internet for the first time.
But one entrepreneur says the swipes and taps we take for granted on a touchscreen device aren't intuitive for users with no experience.
Watch the video above to see Hassan Baig explain how he's trying to help people use the Internet on mobile devices for the first time.