Read about the sound barrier, how people broke it, and why breaking it was important.Vickey Herold. How Did People How Did People Break the Sound Barrier? Break the Sound Barrier? People built airplanes that flew faster. v 12 People used faster airplanes. People built airplanes with rocket engines. v People used rocket.
|Title||:||Discover the Sound Barrier|
|Publisher||:||Benchmark Education Company - 2006-01-01|