This is my interpretation of September 11th attacks in 2001:
The horizontal line represents the aircraft's trajectory through the twin towers that were the target and ends by the "explosion" of a star/state which also recalls the impact of a ball.
The dripping American flag is showing at the same time the real purpose of this terrible plan (the oil) and its tragic consequences (the blood) that is, directly or indirectly, the sacrification of his own people.