1. Then in high school I became obsessed with space and had a bit of an existential crisis.

2. There is no question that the incumbent hardware and software providers view OpenStack as both an opportunity and an existential threat.

3. Residents see Islamic State as an existential threat.

4. Some Israelis regard Iran as an existential threat.

5. Signals intelligence agencies were originally tasked with protecting our nations from existential threats during wartime.

6. Since then, the existential attacks have continued.