Earlier this week, United Airlines became the first air carrier in the U.S. to make a commercial flight using a 40 percent algae-based jet fuel from Solazyme. And today, Air Alaska is flying the nation's second commercial biofuels flight, using a fuel containing a 20 percent cooking-oil-based feedstock produced by Dynamic Fuels. Air Alaska will be making 75 trips within the U.S. over the coming weeks using the cooking oil blend.