How to use "event" in a sentence

But, in the event that the Congress shall fail to take one of these two courses, in the event that the national emergency is still critical, I shall not evade the clear course of duty that will then confront me

The following morning, Sala got up early for the big event of her week: Cham's Ultranet Talk Hour.

In the event of accidental contamination, you immediately set off an alarm

Many people had heard of the cylinder, of course, and talked about it, but it did not have as much effect as a political event.