TedLipien.com, SAN FRANCISCO — One group of U.S. Government employees that has not received much media scrutiny in the aftermath of the failed terrorist attack are U.S. diplomats who had issued and failed to cancel Mr. Abdulmutallab’s U.S. visa. U.S. Consular Officers at the U.S. Embassy in Nigeria, the U.S. Ambassador to Nigeria Robin R. Sanders, and Foreign Service…