NASA Jet Will Try to Go 7,000 Mph
In March, NASA launched an experimental jet that reached a record-setting speed of about 5,000 mph. Now researchers want to leave that milestone in the dust.
NASA's third and last X-43A "scramjet" was set to streak over the Pacific Ocean on Monday at 7,000 mph for 10 or 11 seconds — or 10 times the speed of sound.