Freezing Rome

A serious earthquake occurred in Rome. The city was deeply destroyed. The military organized rescue operations.
They found the temperature dropped fast. A very large hole appeared in the Roman Colosseum,and cold air emanated from it.
It was getting colder and colder,the military and scientists set a temporary base in the ruined Roman Colosseum to do
some researches.
The leading roles accepted an assignment of slipping into the hole. They found it may be an ancient base of aliens,
and it was freezing to ice. In the center,there was a strange machine spraying Extremely cold air. The earthquake destroyed
the machine,so the energy escaped.If they could not stop that,the whole Rome may be frozen gradually !