2028 and 2035

http://en.wikipedia.org/wiki/(35396)_1997_XF11, http://neo.jpl.nasa.gov/news/1997xf11.html

http://www.nytimes.com/1998/03/12/us/asteroid-is-expected-to-make-a-pass-close-to-earth-in-2028.html

http://www.nydailynews.com/news/world/massive-asteroid-passes-earth-hit-planet-19-years-article-1.1489551

http://www.theguardian.com/world/2000/nov/05/theobserver4

https://www.google.ca/search?q=asteroid+2028&es_sm=93&tbm=isch&tbo=u&source=univ&sa=X&ei=RuXJU6ruG429oQSQmYJw&ved=0CFIQsAQ&biw=1280&bih=699