What was the outcome of the United States' effort to find weapons of mass destruction in Iraq?

Some weapons of mass destruction were found, but not all of them.
Some weapons of mass destruction were found, but not all of them.

A civil war broke out among Iraqi groups.
A civil war broke out among Iraqi groups.

U.S. airstrikes destroyed most of Iraq's weapons of mass destruction.
U.S. airstrikes destroyed most of Iraq's weapons of mass destruction.

No weapons of mass destruction were found in Iraq.