moving at over 3 million miles per hour

a neutron star, known as RX J0822-4300,
Chandra Press Room
Chandra Discovers Cosmic Cannonball November 28, 2007
"By combining how far it has moved across the sky with its distance from Earth, astronomers determined the neutron star is moving at over 3 million miles per hour. At this rate, RX J0822-4300 is destined to escape from the Milky Way after millions of years, even though it has only traveled about 20 light years so far."
http://chandra.harvard.edu/press/07_releases/press_112807.html

Starry Cannonball Shooting out Of Milky Way at 3 Million Mph | Wired Science from Wired.com
http://blog.wired.com/wiredscience/2007/11/starry-cannonba.html

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Will NASA launch Alpha Magnetic Spectrometer? - iTWire

"Called “the most expensive scientific experiments ever built,”
$1.5 billion Alpha Magnetic Spectrometer (AMS) may end up in storage and never get the chance to search the universe for antimatter."
only a prototype AMS (the Alpha Magnetic Spectrometer Investigation) was able to get into space when it went onboard space shuttle Discovery and the STS-91 mission in 1998, the final space shuttle mission to the Russian Mir space station. After the space shuttle Columbia was destroyed in 2003, the AMS mission was cancelled.
http://www.itwire.com/content/view/15592/1102/