Are American Retirees Headed for Poverty?

One piece of information in an article on the coming trends intrigued and concerned me.  As per a study [http://theweek.com/bullpen/column/237092/5-disturbing-trends-you-should-pay-attention-to-in-2013] , the Americans will be left with very less money at the end of their retirement.  This is pretty serious. Without a big enough retirement