....was the deadliest weapon used.
Our today's guest is .....
It was devastating.
It was caused by .....
Wars bring about devastating affects or impacts.
There so many reasons why .....
It was due to .....
What was the most catastrophic weapon used in wars?
Our guest today is .....
One of the reasons is ....
Our top guest is .....
It must bring about a devastating impact.
The impacts were horrible.
The cause was .....