The man accused of using a high-powered rifle to try to assassinate President Obama has been found mentally competent to face the charges against him. But prosecutors aren't taking any chances. Oscar Ramiro Ortega-Hernandez, 21, of Idaho is accused of parking his car outside the White House on the evening of Nov. 11 and taking aim with an assault rifle. He fired up to nine shots, including one that struck a window of the Obamas' living quarters. That bullet was halted by security glass. The president was never in any danger. He and the first lady were in California at...