Q: In this task, a passage will be given and the goal is to generate a question about temporal relations based on that passage. A temporal relation describes the relation between two things with respect to time e.g., something happens/starts/terminates/... immediately/shortly/usually/... before/after/during/... something else.
 Your question should include an event, or ask about an event, and should not be a yes/no question.
Passage: Iraq still has the potential to cause significant problems by using forces and weapons that don't yet seem fully engaged. For one thing, Iraq still apparently hasn't unleashed its stockpile of chemical weapons.
A:
What event has already happened?