Advertisement401(k)s Still Fall Short As A Retirement StrategyMarch 04, 2010John YdstiefacebookEmailAircraft mechanic Jere Herr of Indianapolis prepares to go to work while seated in his recreational vehicle, parked in a lot at the Los Angeles International Airport. He lives by the airport to save money for the future. One-third of Americans will have to rely on Social Security benefits — not pensions — in their retirement years. (Getty Images)