Resolves YES if there is a nuclear exchange (launch of nuclear weapons against another nation or state) before 2025.

Resolves YES even if said nuclear weapons fail to reach their target, as long as they were intended to by the government that launched them.

Resolves YES even if the nuclear exchange is accidental, as long as said nuclear weapons do not fail to reach their target.

Resolves NO if there are no attempted nuclear attacks/exchanges against any nation or state before 2025.

Fine Print

A rogue attempt at launching a nuclear attack that simply fails, where no nuclear weapons of any kind get launched, does not count, and resolves NO.

Any successful and purposeful launch of nuclear weapons, against any nation or state, that are on route to a target city or military base or other location, counts as a nuclear exchange whether it reaches the destination or is shot down, or exploded mid-air by the military of another country, and resolves YES.

Finally, an accidental launch of a nuclear weapon, against another nation or state, does not count if said nuclear weapon fails to reach it's target. If said nuclear weapon does reach it's target, and explodes, this resolves YES.

Summary

Resolves YES if there is a successful nuclear exchange (purposeful or accidental), or an unsuccessful yet purposeful nuclear exchange, before 2025.

Definition of a "Successful Attack":

A nuclear weapon hits it's target, or hits a target of a separate nation or state, and causes damage.

Damage as in: Either death or destruction in some form; to humans or to human-made structures such as buildings, houses, monuments, etc.