Add meteors to the list of threats besides the MPLA

Without more funding, NASA will not meet its goal of tracking 90 percent of all deadly asteroids by 2020, according to a report released today by the National Academy of Sciences.

http://www.cnn.com/2009/TECH/space/08/13/nasa.asteroid.detection/index.html

I wouldn't worry too much since it's 10+ years away.  On the other hand, you might want ot add this to the list 

http://www.2012doomsday.com/