WASHINGTON – Though the Homeland Security Department has not terminated a high-ranking department official accused of resume fraud, sources say she's been denied the security clearance she needs to perform her job. Laura Callahan, the department's deputy chief information officer, was placed on paid leave in June while officials investigate her academic credentials. The advanced degrees she lists on her resume are from a diploma mill. Callahan's assistant, Jim Shepard, says she is still out on leave and has not been fired. However, sources say she was denied Top Secret clearance and is appealing the decision. Callahan's lawyer did not...