Near Misses
Links
1997 XF11
http://spacewatch.lpl.arizona.edu/1997XF11.html
Provides 3 black and white images that helped at the discovery of this object.
Asteroid 2002 NT7 Under Watch, Odds of Impact Decline Dramatically
http://www.planetary.org/html/news/articlearchive/headlines/2002/Asteroid2002NT7-UnderWatch.html
Includes details about the risk of impact between asteroid 2002 NT7 and Earth.
Asteroid On Collision Course With Earth
http://space.about.com/library/weekly/aa072602a.htm
Short article examining how much danger Asteroid 2002 NT7 poses to the Earth.
Caveat Impactor
http://science.nasa.gov/headlines/y2002/26jul_nt7.htm
Provides a timeline and a history of events related to asteroid 2002 NT7 and explains the low chances of an impact with Earth.
Doomsday Asteroid
http://home.netcom.com/~speaker6/doomsday.html
Countdown clock for possible impact with asteroid 1997 XF11, threats of other asteroids, recent close calls.