Former New York City Mayor and current Donald Trump supporter Rudy Giuliani questions the outcome of FBI Director James Comey's investigation into Hillary Clinton's emails.
Marine Gen. Robert Neller told a CSIS conference that the military needs to train personnel on how to function in the field without relying on the use of GPS and cell phones so they won't be detected by the enemy.
The founder of the Huffington Post is on a personal crusade to end our sleep crisis, which leaves around 40% people sleep deprived. She spoke to CNN's Richard Quest about her book, "The Sleep Revolution."
In 2009, passengers on the US Airways flight that crash-landed into the Hudson River praised the actions and courage of the pilot. CNN's Jason Carroll reports.
Design student Lucie Davis made these high tech nails for a university project. The Tube's Oyster Card comes with an RFID chip inside, which she embedded.
Katie Ledecky helped anchor the US women's 4x200m relay team to a gold medal. Kohei Uchimura, the Japanese "Superman" won his second consecutive gold medal in the men's gymnastics individual all-around.
The Bolt is an electric bike that can go 40 mph but doesn't require a license or insurance, and can ride in the bike lane. CNNMoney's Samuel Burke takes it for a spin.
