The events of 9/11 as they unfolded through actual audio.
Hypersonic Jet - NY to LA in 36 Minutes
UPDATE: FAILED ATTEMPT -- An unmanned experimental aircraft failed during an attempt to fly at six times the speed of sound in the latest setback for hypersonic flight.The X-51A Waverider was designed to reach Mach 6, or 3,600 mph, after being dropped by a B-52 bomber off the Southern California coast on Tuesday. Engineers hoped it would sustain its top speed for five minutes, twice as long as an X-51A has gone before. But the Air Force said Wednesday that a faulty control fin prevented it from starting its exotic scramjet engine and it was lost. ORIGINAL DESCRIPTION: Who needs business class when your overseas flight will last less than an hour? Some of the first tests of such a technology happened Tuesday off the California coast as the Air Force tested its hypersonic X-51A Waverider vehicle. At just 25 feet long and only a few inches in diameter, the Waverider is a far cry from an aircraft that can carry people anywhere. But the technology one day could send people or troops across the world in just minutes. Hypersonic travel, meaning speeds of Mach 5 (3,800 miles per hour) and above, has been a focus of the military as it looks to perfect a technology that can become the new stealth. The Pentagon says that countries are becoming wiser to US stealth technology and it is increasingly becoming a less effective tool. Read more at http://security.blogs.cnn.com/2012/08/15/hypersonic-flight-what-does-it-mean/