Particle+Accelerator

Group one - http://www.news.com.au/heraldsun/story/0,21985,24324950-5012749,00.html

Group two - http://edition.cnn.com/2008/TECH/09/10/lhc.collider/?iref=hpmostpop

Group three - http://www.swissinfo.ch/eng/news/science_technology/Court_rejects_protest_against_Big_Bang_machine.html?siteSect=514&sid=9629335&cKey=1220275146000&ty=nd

Group four - http://science.howstuffworks.com/atom-smasher.htm

Group five - __http://www.facstaff.bucknell.edu/mvigeant/univ_270_03/Jaime/HowItWorks.html__

Group six - http://www.rps.psu.edu/probing/largehadroncollider.html