ROBERT FARAGO: Calderon’s Silence on ATF Gunrunning Scandal Explained: “Mystery surrounds the ATF Gunwalker scandal. Who authorized the Bureau of Alcohol, Tobacco, Firearms and Explosives’ stingless sting operation that allowed, indeed enabled thousands of U.S. guns to flow to Mexican drug cartels? Why is the Obama administration stonewalling the Congressional investigation of Project Gunrunner and Operation Fast and Furious? What else are they hiding? And here’s another one: why has Mexican President Felipe Calderon remained on the sidelines of this story, continuing to cozy-up to President Obama when it’s clear that Uncle Sam supplied weapons to the narco-terrorists plaguing his country? Well, it looks like we might have an answer. . . . Anabel Hernández has made quite the charge: the Sinaloa cartel has bought the Mexican government lock, stock and Calderon. What’s more, the DEA knows about the corruption and plays ball with Calderon to catch other cartels, giving the Sinaloas a pass. Which would account for Calderon’s lack of indignation on the whole Gunwalker deal.” Well, stay tuned.