An uncontrollable U.S. experimental satellite which was launched in December 2006 is expected to reenter Earth’s atmosphere between the end of February and early March. Because the satellite was never operational, analysis indicate that approximately 2,500 pounds (1134 kgs) of satellite mass will survive reentry, including 1,000 pounds (453 kgs) of propellant fuel (hydrazine), a hazardous
material.
Although the chances of an impact in a populated area are small, the potential consequences would be of enough concern to consider mitigating actions. Therefore, the President has decided to take action to mitigate the risk to human lives by engaging the non-functioning satellite. Because our missile defense system is not designed to engage satellites, extraordinary measures have been taken to temporarily modify three sea-based tactical missiles and three ships to carry out the engagement.
We should attempt the shoot-down within the next couple weeks. This will also destroy sensitive equipment we don't want falling intact on the territory of potential enemies.
The double demonstration of knocking down a dangerous object coming in from space (you know, like a ballistic missile) and the potential for our missiles to perform an anti-satellite mission will be useful, too.
UPDATE: A press conference on the planned shoot-down and an article (via Instapundit).