Earlier this year, 78 local, state and federal agencies took part in a chemical attack drill, called Rotunda Thunda, at the Las Vegas Convention Center and the Strip.
Can we say the following?
A chemical attack took place at the Las Vegas Convention Center and the Strip.

no

The Security Council voted in 2002 to protect U.S. soldiers and personnel from other nations that haven't ratified the creation of the court through a treaty, and last June renewed the immunity for a year.
Can we say the following?
Immunity for soldiers renewed.

yes

Justice Sandra Day O'Connor announced her retirement in order to spend time with her ill husband.
Can we say the following?
Justice Sandra Day O'Connor announced her retirement.

yes

Twelve of Jupiter's moons are relatively small and seem to have been more likely captured than to have been formed in orbit around Jupiter.
Can we say the following?
Jupiter has Twelve moons.
no