People living in and around the nation's capital experienced a rare, if startling, sound: A sonic boom.
The boom was heard Sunday after the U.S. military dispatched six fighter jets to intercept an unresponsive business plane flying over restricted airspace.
"When this line of shock wave passes by, listeners on the ground hear a very loud noise," according to an explanation from Australia's University of New South Wales. In the movie, someone on the ground asks, "What's that sound?" as Yeager's plane flies above the Mojave Desert and breaks the sound barrier.
In 1963, the U.S. government announced a major program to develop a supersonic passenger aircraft. But serious problems soon surfaced, including massive development costs and doubts about financial viability. The program was terminated in 1971. The Concorde, an Anglo-French supersonic jetliner, saw success for a number of years after making its first commercial flights in 1976. However, its ear-rattling sonic booms irritated people on the ground and led to restrictions on where the jet could fly.
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