Tom and Mary were my backup singers back when I used to perform. ✬

Let's call for backup. ✬

Bring backup. ✬

Tom always has a backup plan. ✬

I'm going to need some backup. ✬

The lone police officer called for backup. ✬

The police officer called for backup. ✬

Did they have a backup plan? ✬

Do you have a backup plan? ✬

I have no backup plan. ✬