On Thursday , June 18 , 2009 , the most powerful supercomputer in Canada went online .
On Thursday , June 18 , 2009 , the most powerful supercomputer in Canada would have ranked twelfth most powerful computer worldwide had it been completed six months earlier .
On Thursday , June 18 , 2009 , the most powerful supercomputer in Canada went online and would have ranked twelfth most powerful computer worldwide had it been completed six months earlier .