Einsten's gravitaction waves theory is proved!

NASA's Gravity Probe B (GP-B) mission has confirmed two key predictions derived from Albert Einstein's general theory of relativity, which the spacecraft was designed to test.
"The mission results will have a long-term impact on the work of theoretical physicists," said Bill Danchi, senior astrophysicist and program scientist at NASA Headquarters in Washington. "Every future challenge to Einstein's theories of general relativity will have to seek more precise measurements than the remarkable work GP-B accomplished."
If you think, what is this good for?, Why we spend lot of money for  proving one theory?. The bread won't be cheaper! But knowledge from this project will be used in n GPS technologies that allow airplanes to land unaided.
For technicians,  Gravity Probe B is not about actually seeing confirmation of one of relativity's less-publicized effects. Instead, it's that these extreme test, measurement, and instrumentation problems that fascinate me. Broadly speaking, they are challenges for one or both of these reasons: the level of precision and accuracy is extreme, and/or the circumstances under which the system must operate is extreme (temperate, vibration, interference of various types, or sheer remoteness).

source: http://www.nasa.gov/home/hqnews/2011/may/HQ_11-134_Gravity_Probe_B.html