Definition: In this task, a passage will be given and the goal is to identify an event from the passage. An event is defined as a single word representing something that happened, is happening, or may happen. An event can be factual or hypothetical, positive or negative, certain or uncertain. While most events are based on verbs, an event can also be based on a noun (ex. storm, snow, rainfall) or a copula verb (is, was, been, etc.). The event must not be a pronoun or an adjective. For noun events with multiple words, use the last word in the phrase as event.
Input: Passage: Adjourned for the election, Saddam's trial on charges of crimes against humanity threatened to exacerbate already high ethnic tensions in the country. Following purported Al-Qaeda threats to "ruin the 'democratic' wedding", virtually all Iraq's 190,000 police and army were mobilized, with US-led troops providing perimeter security for voting stations.

ruin