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.
The SR-71 Blackbird.mashleymorgan / Flickr. The world's fastest manned planes are nothing short of engineering marvels. Capable of flitting through the air at multiple times the speed of sound, these planes take the pilot to the fringe of science fiction. Although a number of these aircraft have since been retired, they continue to be the fastest manned aircraft in history.