QANTAS chairman Margaret Jackson was suspected of being a terrorist and frisked during a visit to the US last year. The airport security guard who checked her was reluctant to believe that a woman could be the head of an airline. Mrs Jackson said yesterday her briefcase was searched after she went through a security check at Los Angeles airport. Among her documents were detailed plans of new aircraft, including cross-section diagrams showing seat layouts. "The guy said `Why have you got all of this?'," she told the Herald Sun. "And I said, 'I'm the chairman of an airline. I'm...