In Ancient Greek, one of the final two or three syllables of a word carries an accent. Each syllable may contain one or two vocalic morae, but only one can be accented; accented morae are pronounced at a higher pitch.
US military to launch fastest-ever plane. By the time you finish reading this sentence, the Falcon HTV-2, the fastest plane ever built, could have flown 18 miles. It would get from London to Sydney in less than an hour, while withstanding temperatures of almost 2,000C, hotter than the melting point of steel.
Fastest plane in the world. NASA's X-43 is the fastest aircraft in the world. On 16 November 2004, the X-43 reached Mach 9.6 (7,000 mph or 11,265 km/h) according to NASA. The X-43 is an unmanned aircraft, which launches not from the ground but from a B-52 at about 40,000 feet (12.2 kilometers) in the air.