Every Monday the siren are tested but today was different.
The first test almost all of the sirens failed to go off.
http://media.putfile.com/siren-test-1
The second test they all went off
http://media.putfile.com/siren-test-2
Now if this was a disaster they would have killed a lot of people all because the sirens did not go off properly the first time. All of the sirens are thunderbolts.
What do you think happened?