Astronaut Sunita L. Williams wouldn't miss the Boston Marathon for anything. Even if she's not on planet Earth.
As luck would have it, space is where Williams will be on April 16, the date of the 2007 Boston Marathon. She'll be competing anyway.
According to the Associated Press, Williams is registered for the Boston Marathon and will compete by running on a treadmill in the International Space Station.
Although Williams will be the first person to run the Boston Marathon in space, she won't be the first off-site competitor. Since 2005, U.S. soldiers in Iraq have competed in the concurrent Boston Marathon in Iraq.
Williams was even e-mailed an official Boston Marathon numbered bib for the race...not that she'll be hard to spot. She'll be the one in space.