By Dan Whitcomb (Reuters) – The Biden administration on Friday reversed a 1954 decision by the U.S. Atomic Energy Commission (AEC) to revoke the security clearance of Robert Oppenheimer, known as the “father of the atomic bomb” for his work on the Manhattan Project. Energy Secretary Jennifer Granholm said in a written order that the since-dissolved AEC acted out of political motives when it revoked Oppenheimer’s security clearance nearly 70 years ago. Oppenheimer died in 1967. “The Oppenheimer matter concerned a man who, not long before, had played an indispensable and singular role in the war…