What are my options for making a front door that is mostly glass secure?

My front door is currently constructed of large glass panes with metal framing. Additionally, there’s a metal security gate that visitors have to pass through to get to the front door. I’d like to remove the metal security gate, but am worried that a glass front door alone presents a security hazard, even though the glass is very thick.

Can anyone recommend a solution to my problem?

You could consider adding a screen door to go in front of it.