How to deter gas thieves, circa 1974: Flickr photo of the day

By the time a U.S. government photographer caught this father and son in Oregon ready to defend their tank from siphoners 39 years ago this month, the OPEC-led oil embargo and subsequent gas shortages were nearing their end. If you number among those too young to remember even-odd sales days, gas lines and the assorted chaos, count yourself lucky. And while the United States' demand for oil has fallen steadily since 2005, it's still 11 percent larger than it was when this Buick Skylark owner packed heat. If you have a shot to share, add it to the Motoramic group on Flickr, or send us a message via Twitter, Facebook and Google+.