Edit. After Black September's assassination of Israeli athletes at the Munich Olympics in 1972, Prime Minister Golda Meir okays a black-box operation to hunt down and kill all involved.
Yellow pollen is produced by evergreen trees, primarily pine trees, including spruce, true cedar trees, fir trees, larch and hemlock. Although yellow pollen looks like it could cause an allergic reaction, in reality it does not trigger allergy symptoms at all. It can stain the skin and clothing, however.
Most trees release their pollen in the late winter or early spring. Tree pollens that trigger allergies tend to be very fine and powdery. The wind can carry them for miles. While pollen may be almost invisible, inhaling even small amounts can trigger allergy symptoms. Trees that often trigger allergies include: 1  Ash.