NEW YORK: An employee of the U.S. Mission to the United Nations, the sister of former U.S. presidential candidate John Kerry, testified Thursday that she canceled a meeting with a women's group last March when she saw prominent anti-war activist Cindy Sheehan and several reporters among them.Sheehan and three other women face charges of disorderly conduct, obstructing government administration, trespass and resisting arrest after sitting in front of the U.S. mission and ignoring orders to leave. They each face up to a year in prison if convicted.