Chances are the Secret Service won't be ditching its signature black SUVs for these things anytime soon, but if all goes according to President Obama's new energy plan, even the Commander in Chief's armed guards will be rolling more eco-friendly in the next three years. In a speech given at Georgetown University Wednesday, the President said he expects all government agencies "to purchase 100 percent alternative fuel, hybrid, or electric vehicles by 2015." Now, that doesn't mean they'll have to get rid of pre-existing gas guzzlers, but any new p
