From an internet search:
After she'd met Cohen, he asked vanden Heuvel if she would smuggle
dissident journals out of Moscow. He thought that she had a diplomatic
passport --because her father was then the U.S. Ambassador to the United
Nations in Geneva. She didn't enjoy diplomatic immunity, however. (It was on
her way to see her father in Geneva in 1978 that vanden Heuvel's plane was
hijacked by a man -- a former low ranking Nazi -- who demanded the release
of Sirhan Sirhan and Rudolf Hess. The hijacker was later arrested in a chess
club in Manhattan. "And I am cured of my fear of hijackings," vanden Heuvel
says. "In fact, I fly with no fear. When I go, it will not be on a plane!")