Final answer:
Political conflicts, such as the Hainan Island incident, caused cargo mission interruptions of international organizations like the United Nations.
Step-by-step explanation:
The incident that caused cargo mission interruptions of international organizations such as the United Nations is political conflicts. An example of such an incident is the Hainan Island incident in 2001, where a U.S. spy plane collided with a Chinese jet fighter. This incident led to negotiations between the two countries and the possibility of diplomatic and economic sanctions if the negotiations had not succeeded.