Skydiver Felix Baumgartner breaking sound barrier for Red Bull Stratos. Talk about extreme. Whether people question whether skydiving is a sport or not, it certainly is challenging and requires strong technique.
A cluster of Concordes gather nose-to-tail at London's Heathrow airport. Air France and British Airways ran a regular transatlantic service to New York with an average flight time of just 3 and a half hours.