In Virginia Tuesday, the FBI was handed further embarrassment at the trial of Zacarias Moussaoui. The supervisor of the agency’s international terrorism division testified he had not read a memo delivered in August 2001 that recommended an investigation of Moussaoui as a possible hijacker. The testimony of Michael Rolince, now retired, came after Monday’s testimony from FBI agent Greg Samit that he spent four weeks trying to convince his superiors Moussaoui posed a security risk. According to Samit, FBI officials ignored his warnings.